[The following was inadvertently omitted in 

 printing. See X mark, page 5, first column.] 

 outer one is not so perfect as the inner one, yet 

 each indicates that the foot pressed through 

 about four inches of mud and raised a moder- 

 ately broad margin of one inch in height, thus 

 making the apparent depth five inches; and this 

 depth was not in one layer of mud, but at least 

 two are indicated by the annexed drawing. 

 These are the two tracks which were first ex- 

 posed to Dr. Harkness, Mr. Gibbes and Prof. 

 LeConte, and described by them. 



In the outside tracks there is nothing to indi- 

 cate in which direct" on the apparently round- 

 footed animal was moving; but in the two best 

 preserved examples there is a decided duplica- 

 tion on the margin of each in the line of march, 

 but not extending to the depth or the breadth 

 of the wliole foot. The footprint exhibits the 

 exposed addition as a segment having a chord of 

 about one- third of the diameter, or less than 

 one half the diameter, of the main .imprint. 

 Each of these two principal footprints is twenty 

 inches across at right angles to the line of march. 



I examined carefully for finer markings on the 

 margins of the priats, but could see no evi- 

 dences of any other indentations as if from 

 toe-pads, etc. This addition at the margin 

 either indicates the duplication of the footprint, 

 or it affords a clue to the shape of the foot. The 

 hind feet would appear to have stepped into the 

 pr'nt of the forefeet with great regularity, but 

 I could see no evidences of any other indenta- 

 tions, as if from toe-pads, etc. 



It would be extremely interesting to have at 

 least two more of these footprints exposed, 

 and that the members should again scrupulously 

 and minutely examine them when they are 

 brought to light, and at once obtain casts under 

 the most favorable conditions of freshness, etc. 

 Tablets of the Footprints to be Made. 



These two series of great footprints just de- 

 scribed seemed to me so valuable in paleonto- 

 logical investigations that I laid down a plan to 

 reproduce them as nearly as practicable in their 

 present condition and relation. For this pur- 

 pose Messrs. Blake and Gibbes and myself have 

 measured a line through each, and at eaph foot- 

 print in the first series described, and including 

 the well marked birds' tracks, a series of de- 

 termined oflsei/s indicated by drilled holes, has 

 been so arranged that each plaster cast will 

 contain tvro of these holes, and each footprint 

 will be numbered. 



From these casts v/e hope to be able to re- 

 construct, in sections, a tablet for series Xo. 1, 

 not less than forty-six feet long and three feet 

 wide for the greater part, and about six feet 

 wide at the part under the cliff, where the two 

 animals crossed in their march. 



In the line of mammoth tracks, a central 

 line was laid down, and offset measures'will be 

 made at each imprint to properly locate and 



orient the same. The length of this series will 

 be about forty feet, and should two fresh tracks 

 be uncovered, it will reach forty -nine feet in 

 length. 



That these representations of the actual 

 tracks will be of great importance, goes for the 

 saying; and already inquiries have been made 

 for copies on behalf * of the Smithsonian Insti- 

 tution, for the museum at Paris, for the Cen- 

 tral Park, New York (through D. 0. Mills), 

 etc. This work is now being done under the 

 direction of Mr. Frank Bell. 



Length of Stride, etc 



As determined by Mr. Gibbes, the pathway 

 of the mammoth tracks is about thirty-six inches 

 broad, and the breadth of what has been de- 

 nominated the straddle is nineteen inches. My 

 measures of the average longitudinal distance 

 apart of the imprints of the eastern steps is, for 

 five spaces, eight feet eight inches, and for four 

 spaces of the imprints of the western steps, is 

 eight feet nine inches. The imprints are not 

 evenly separated, the range being nearly two 

 feet. 



For the quadruped of the first series, the so- 

 called man, the longitudinal distance apart of 

 the imprints of the right feet for nine spaces is 

 four feet ten inches, and for nine spaces of the 

 left imprints, four feet nine inches. 



I did not measure the breadth of the straddle 

 of this series, being satisfied with Mr. Gibbes' 

 previous measurement of nineteen inches, which 

 is the same as that of the mammoths. 

 Footprints of the Elk. 



The next series of tracks that we measured 

 were those which Prof. Blake and myself provis- 

 ionally, and for reference only, have denominated 

 the elk. But there is no proof whatever that 

 they were made by an elk. We could not make 

 out any one footprint specifically, because the 

 mud layer had been too soft and deep, and the 

 animal evidently had sharp feet, or hoofs, which 

 went down deeply, as if the animal were quite 

 heavy. But we felt satisfied of the direction in 

 which the animal was moving. We did not 

 preserve the strict line of march of the animal, 

 but measured the distance apart of the consecu- 

 tive imprints and the breadth of the straddle. 



The imprints appear to have been made by a 

 second foot treading in or very nearly in the 

 track of the first. The prints average 4 inches 

 long and 3^ inches broad. The breadth of the 

 straddle is"l3 inches, and the longitudinal dis- 

 tance apart of the imprints of 7 tracks on one 

 side is 6 feet 2 inches, and of 6 tracks on the 

 other side is the same. 



The diagram exhibits the distances measured 

 from one footprint on one side to the next foot- 

 print on the other side, and these distances are 

 laid down for an average path ay. Five feet 

 from the line of the above prints were footprints 

 which might have been made by a deer or some 

 similarly cloven hoofed animal. 



