[32] 
10 
copy of the records of the Board in relation to tlie Ohio and Laka 
Erie canal routes, and nineteen maps, general and particular, of the 
several sections of country explored and surveyed, of which the fol- 
lowing; is a list. 
Wo. 1. Surrey of part of the route of the Potomac canal, in 1824, 
by J. J. Abert, Major and T. E. assisted by Lieuts. Swift, 
Macomb, Bennett, Long, and Wilson. 
No. 2. Maps of the eastein section of the summit level of tlie Che- 
sapeake and Ohio canal, surveyed by Wm. Gibbs McNeill, 
Caj)t. U. S. Topographical Engineers, Lieuts. Lewis G. De 
Russy. Wm. Cook, Isaac Trimble, R. C. Hazzard John 
N. Dillahunty, John M. Fessenden, W. G. Williams. 
No S. Profiles attached to Capt. McNeill's map of the summit level; 
numbered 2. 
No. 4. Profiles attached to Capt. McNeill's map of the summit level; 
numbered 2. 
No. 5. Profiles attached to Capt. McNeill's map of the summit level; 
numbered 2. 
No. 6. Profiles attached to Capt. McNeill's map of the summit level; 
numbered 2: 
No. 7. Profiles attached to Capt. McNeill's map of the summit level; 
numbered 2. 
No. 8. Profiles attached to Capt. McNeill's map of the summit level; 
numbered 2. 
No. 9. Plan of a proposed summit level of the Ohio and Chesapeake 
canal, between the Little Youghiogany and Crabtree creek, 
by Mr. Howard, assistant Civil Engineer. 
No. JO. Profile of the surface of the ground over a proposed summit 
level of the Ohio and Chesapeake Canal, by Mr. Howard, 
assistant Civil Engineer. 
No. 11. Map of surveys of thewestern section of the summit level of 
the Chesa])eake and Ohio canal, by James Shiiver, assis- 
tant Civil Engineer. 
No. 12. Topogi-aphy of the map of surveys, by James Shriver, as-< 
sistant Civil Engi'ieer. 
No. in. Profiles attached to Mr. James Shriver's map. numbered 11. 
No. 14. Profiles attached to Mr. James Shriver's map, numbered 11, 
No. 15. Profiles attached to Mr. James Shriver's map, numbered 11, 
No. 16. Map of the country between Washington and l^ittsburg, 
shewing the proposed routes of the Chesapeake and Ohio 
CanaK compiled by E. H. Courteney, Lieut, corps Engi- 
neers. 
No. 17. Map of the country between Pittsburg and Lake Erie, shew- 
ing the proposed routes of the Ohio and Ejie canal, com- 
piled by Mr. Howard, assistant Civil Engineer. 
No. IS. Map of the country between Pittsburg and Pliiladelphia, 
sliewingthe route of a proposed canal from the Ohio to the 
Delaware, compiled by George Button, Lieut, corps of En- 
gineers. 
