596 APPENDICES. 
Tomas Duny, F. D 
James H. Houston, L. C 
Raymonp Nias, P. B. Mowry, 
T. W. Tanst11, W.B 
James T. Scort, Ae? 
From the corps of Topographical Engineers : 
Brev. Lizur. Cot. Joun McCietian, Chief Astronomer, and Head 
of the Topographical Scientific Corps. 
Capt. E. L. F. Harpcasrtez, Assistant do. 
Lieut. A. W. Wurerte, do. do. 
Colonel oe was recalled in October following, and Brevet 
Lieutenant Colonel J. D. Graham appointed in his place. The latter 
was recalled in October, 1851, and Brevet Major W. H. Emory ap- 
pointed to his place; and soon after Mr. A. B. Gray, Principal Surveyor, 
was recalled, when Major Emory was appointed Surveyor, and the office 
of Chief Astronomer abolished. The Commission was greatly reduced 
in the summer of 1851, at which time other changes were made. 
The following gentlemen, who accompanied Colonel Graham, re- 
ported themselves at the head quarters of the Commission, at the Cop- 
per Mines, in July and August, 1851: 
Ou arzes Rapzimryskt, Principal Assistant Surveyor. 
Lieut. A. E. Burnswe, 3d Artillery, Quarter-master and Commis- 
sary. 
Lrevr. W. F.Surrn, Topographical Engineers, Assistant Astronomer. 
Henry C. Pratt, Draughtsman and Artist. 
Joun H. Crark, Zoologist and Assistant Computer. 
CuarLes Wricut, Botanist and do. 
Joun Lawson, Clerk to Colonel Graham. 
W. A. Taytor, Sub-Assistant in = Saag Corps. 
Joun J. Prart, 
Major Emory, on joining the Surveying party on the Rio Grande to 
relieve Colonel Graham, was accompanied by the following officers, 
to be added to those already detailed for that party : 
Lrevt. Micutrer, Topographical Engineers. 
Arruur Scuort, First Assistant Surveyor. 
Epwarp Iyeranam, Sub- Assistant do, 
George C. Garpner, Clerk. 
