This map is believed to have been completed by Ian Ellis in 1975. Currently the only known enterance is under the control of a group out of Georgia.
The following information was attained from http://www.caves.org/section/asha/
National Speleological Society AMERICAN SPELEAN HISTORY ASSOCIATION
6304 Kaybro St. Laurel, MD 20707
August 21, 2006
Hello,
Here is the Frenchman Knob article you requested.
I apologize for the delay in getting this to you. I couldn't understand your phone number on the first message you left for me a few weeks ago and I was out of town on vacation when you called recently.
I hope you find the article helpful.
Bob Hoke ASHA Treasurer
FRENCHMAN KNOB. THE BOTTOMLESS PIT IN KENTUCKY
Angelo I. George
Kentucky possesses few really deep pit caves when compared to prime areas like northeastern Alabama. Thick elevated limestone sequences and deep nearby stream valley entrenchment are lacking for shafts of this nature to form. Frenchman Knob Pit is a vertical cave that stands out among all the rest, both in depth and historical significance, as a natural curiosity in Kentucky.

It is located along the southeastern flank of Frenchman Knob in northern Hart County where the topography is very rugged and is locally called the Brush Creek Hills.1 Lewis Collins in his 1847 History o£ Kentucky was the first to draw attention to this pit as one of the interesting spots of the county. He says: Six or seven miles north north-east from the county seat [Munfordville], is the "Frenchman's Knob," so called from the circumstance that a Frenchman [Gilbert LeClerc] was killed and scalped upon it. Near the top of this knob, there is a hole or sink which has been explored to a depth of 275 feet, by means of letting a man down with ropes, without, discovering bottom! 2
This same quote has been cited time and again by Kentucky historians William B. Allen, Richard H. Collins, William H. Perrin, J. H. Battle, and Gilbert C. Kniffin during the 1870*s and 80's, and in many contemporary works. 3 Only Perrin, el al., elaborated on the Collins description by adding some popular mythology on the John Clevis Symmes hollow earth theory by stating the pit is "popularly supposed to be the short route to China." 4
It was just this kind of depth description that sparked the interest of some young local cave explorers by the names of James W. Dyer and William T. Austin. Together with William Rindt, E. Klein, J. Blankey, and J. Neidener they prepared to drop the pit on August 3, 1949. Using 160 feet of rope ladder, Austin made the initial descent to the top of the breakdown pile. He signaled back to his companions about the big cave at the bottom, and they all climbed down to see the cave. During their exploration, they found evidence that they were not the first to descend into the depths of Frenchman Knob Pit. Dyer says they found signatures and an 1895 date on the wall, which may have been by the original successful explorers of the pit cave.
The pit seems to have again gone into oblivion until 1958 when Robert Halmi of True magazine produced a photo journalism article on the descent and exploration of the cave. Halmi is best recognized for his coverage in the same publication of the 1954 Floyd Collins Crystal Cave C-3 Expedition.
Halmi wanted to do another cave story, needing something in the caliber of the C-3 Expedition to excite readership and to show that Kentucky had deep pits similar to those in the French Pyrenees. He contacted William T. Austin at Mammoth Onyx Cave, north of the town of Horse Cave, for story ideas. Austin and his caving buddies had already done Frenchman Knob, but figured it would make a good exciting adventure story.
Halmi wrote, "We had 150 feet of small aluminum ladder and 320 feet of nylon rope. We used all of it, and never hit bottom." Tying off their rope, seven cavers rappelled into the shaft. "Two hundred feet down" [actually about thirty feet down from the low side] Halmi wrote that "we hit a ledge where we were able to bring the ladder into play," and "another 80 feet down ... we found a tangled mass of dead trees and rocks that had fallen in [probably the top of the breakdown pile]." Near here another "deep hole apparently without bottom" was mentioned. Fatigue, time, and insufficient rope prevented the descent of this last drop. The exploration team managed to reach what they said was a total depth of 500 feet below land surface, in the vicinity of the formation room. Using Halmi's rope and ladder length figures, the entrance drop was reportedly in the range of 280 feet, which closely agreed with Collins's 1847 account. Important to remember in this descent of Frenchman Knob is the early use of single rope technique, although ladders were used in the last drop, a holdover from the European approach to pit work.6
Since the 1973 Kentucky Speleofest held in Beech Bend Park, near Bowling Green, Frenchman Knob has been a favorite yo-yo spot. Whenever the pit is used as part of the Speleofest program, it receives from twenty-five to fifty cavers per day. The first compass and tape map of the cave was made by Bill Holmes, Dave Weller, and Roger Miller in May, 1971. This was a line map showing major side passages with a cross section of the entrance pit showing both the low [at the big tree] and high side tie offs.
In 1973 Roger Miller produced a very good physical description of the cave, which he called "a near Utopian playground for the vertical caver." This was the first largely accurate account of one of the deepest holes in Kentucky. The pit's depth as reported by Collins and Halmi shrank from 280 to 150 feet, measured from the low side. Miller's figure for the high side was 170 feet, and he stated that "the original depth of the pit to the floor of the cave passage has been calculated to have been in excess of 200 feet before mud and debris filled it to its present level." The depth of the pit was determined by tying a knot in the rope where it touched the top of the breakdown pile, hauling it out, and measuring it with a tape.?
The Holmes survey logged in about 960 feet of high, narrow canyon passage, with unsurveyed leads connecting to peripheral shafts along the length of the cave. During their ascent back to the surface, Dave Weller did not have the physical strength to jumar out. So, Holmes, Miller, and the rest of the crew hand hauled Dave out of the cave. What got their goat was Dave eating his lunch from his pack while being hoisted, which almost triggered a decision to leave him in the pit! On another occasion, according to Miller, the pit claimed a broken arm. ° In 1972 a portion of the cave, which was called The Blue Hole, was surveyed by the Wisconsin Speleological Survey, with 694 feet mapped. This map is not generally available.
By 1975 Ian Ellis (see map above), was fireballing around the caves of Kentucky, and one of his stops was Frenchman Knob Pit. His physical description appeared in the 1975 Speleofest Guidebook, and along with the Miller description, makes a fine supplement to the knowledge about the interior of the cave. During his exploration, he made a sketch map of the cave and side passages. This map was combined with the Holmes map and also published in the 1975 Speleofest Guidebook. Again, the entrance drop seems to have shrunk in depth. Vol. 18, Nos. 3 & 4 102

Ellis says, "the pit has a depth of up to 195 feet to the passage floor, with a choice of a high side drop of 145 feet (three-fourths freefall) or a low side drop of 129 feet." After "arriving on a. 50- foot [high] mud and and log pile, a few minor dome-pits at the side are seen." These "minor dome-pits" are very probably the same pits Halmi described as being bottomless. Ellis annotated cave passage detail with a sketch. Cave wall width, height, side passage detail, bat colony location, and hydrologic flow direction data were added to the Holmes map. The map was redrafted for the 1979 Speleofest Guidebook.10
In 1976 a joint venture by the Blue Grass Grotto, Lexington, Kentucky, and the ESSO Grotto, Huntington, West Virginia (the same group responsible for the survey of James Cave, Edmondson County, Kentucky), produced a high quality map of the cave, which was called The Kentucky Blue Hole. Sara Corrie has remarked that this is one of her favorite caves. The unpublished map shows a pit depth of 145 feet on the high side and 125 feet on the low side. Over 2,280 feet was surveyed with more to go. The cave was drafted using the latitude and departure method of plotting.11
During the 1975 Speleofest, Angelo George led a geology field trip with emphasis on pseudo and interstratal karstification. Frenchman Knob Pit was stop No. 2, and was used as an example of interstratal karst development occurring between the Big Cliffy Sandstone and the Girkin Formation. One of George's figures in the guidebook presented a schematic cross section extending from the heartland of the Brush Creek Hills, and then south southeastward to Green River. Within the cross section is the vertical profile of Frenchman Knob Pit, with the suspected groundwater gradient toward springs on the Green River. George thought the stream discharge point for the waters in Frenchman Knob was unresolved, but he did suspect either the Johnson or Boiling Springs. In the early 1980's Dr. James F. Quinlan and his Upland Research Laboratory of professional cavers injected dye in the main cave stream of Frenchman Knob Pit, and bugged a number of possible spring discharge points. The dye resurged from Johnson Spring, a straight line distance of 3.65 miles.

There have been stories about petrified trees in Frenchman Knob's canyon passage ever since Bill Holmes excidedly reported such to George in 1971. Roger Miller and William Hopper have reported seeing "ancient Mississippian tree branches" protruding from the canyon walls. Hopper indicated that to his "knowledge this [the petrified wood] is very unusual." A few years later, Holmes made a trip to the cave, and samples of the petrified wood were taken to George for examination. The fossils, however, were not tree branches, rather they were examples of a branching type sea coral called Siphonodendron g;enevievensis (Lithostrotion hanaodites). The original discovery by Holmes of the fossil corals helped to position the attitude of the cave in its proper stratigraphic position. Furthermore, Hopper established the twelve foot thick sequence of crossbedded white limestone with the occurrence of j3. genevievensis. The late Dr. Edward R. Pohl in his small monograph on the stratigraphy in the central Kentucky karst, says this fossil "has been found only in beds at the position of the Joppa Limestone, which in this area ranges in thickness from six to 12 feet." This fossil has wide geographic range and is a good index fossil for the Joppa aember of the Ste. Genevieve Limestone.13
Although known at least 140 years, since the days when locals would throw in rocks to sound its depth, to the exploration efforts of modern vertical cavers,
JOURNAL OF SPELEAN HISTORY 103
Frenchman Knob Pit remains one of the deepest and best known natural shafts in Kentucky.
ACKNOWLEDGMENTS
. Many thanks to Sara Corrie-for her personal insight on the mapping and exploration efforts of the James Cave gang; Richard Blenz for locating descriptive material; and to William Austin, Bill Holmes, David Weller, Ian Ellis, and Roger Miller, whose long ago conversations contributed much to the understanding of the history of Frenchman Knob Pit. Laurence McCarty proofread the manuscript and offered some suggestions for its improvement.
FOOTNOTES
1-Carl 0. Sauer, Geography of the Pennyroyal (Frankfort: The Kentucky Geological Survey, 1927), Ser. VI, Vol. XXV, p. 48.'
^Lewis Collins, Historical Sketches of Kentucky (Maysville, Ky.: Lewis Collins, 1347), 345.
^William B. Allen, A History of Kentucky (Louisville, Ky.: Bradley & Gilbert, Publishers, 1872. Reprinted by Green County Historical Society, 1967), p. 132; Lewis Collins, Collins' Historical Sketches of Kentucky (2 vols., Covington, Ky.: Collins & Co., 1874). Revised . . . and brought down to the year 1874, by his son Richard H. Collins. II, p. 333; William H. Perrin, J. H. Battle, and Gilbert C. Kniffin, Kentucky; A History of the State (Chicago: F. A. Battey, 1887), 3rd edition, 991. fold.
^James W. Dyer, "Kentucky Cavers Explore Blue Hole," NSS News, VII (September, 1949).
^Robert Halmi, "Men in Action: Discovery of a Bottomless Hole," True (March, 1958), pp. 12-15.
7Roger L. Miller, "Frenchman Knob Pit (The Blue Hole, or the Bottomless Pit of Kentucky)," Guidebook to the Kentucky Speleofest (1973), pp. 41-2.
Slbid., 42.
^Personal communication from Joseph W. Saunders.
lOian G. Ellis, "Frenchman Knob Pit (Kentucky Blue Hole)," Kentucky Speleofest Guidebook (Louisville: Speleopress, 1975), pp. 15-6, 22. Reprinted in Guidebook: Kentucky Speleofest '79. pp. 25-6.
-U-Privately distributed blue line map by Blue Grass and ESSO Grottos.
12Angelo I. George, "Preliminary Investigation of Pseudo and Interstratal Karstification Along the Northern Boundary of the Central Kentucky Karst," Kentucky Speleofest Guidebook (Louisville: Speleopress, 1975), pp. 48-69; Angelo I. George, Caves and Drainage North of the Green River (Unpublished manuscript, 1977), p. 16; Personal communication from Dr. James F. Quinlan.
13Miiier, "Frenchman Knob Pit," p. 41; William Hopper, "Frenchman Knob Pit," Crawlway Courier, IX, No. 1 (1975), pp. 1-2; Edward R. Pohl, "Upper Mississip-pian Deposits of South-Central Kentucky," Kentucky Academy of Science, XXXI, No. 1-2 Q.970), p. 11. A natural cave has been discovered in Duvall County, Texas, which has gushing streams, a deep well, and walls composed of sulphate of lime.
New York World, May 31, 1867
Vol. 18, Nos. 3 & 4 104