260 SPENCER FULLERTON BAIRD 
Baird began the year by outfitting J. H. Clark, in 
1851, for scientific service with the Mexican Boundary 
Survey. He arranged to work up the Reptiles of the 
Wilkes’ Exploring Expedition, Girard to do the work 
under Baird’s supervision and get the pay. He went to 
Philadelphia and New York in connection with the print- 
ing of the American Association’s Report and negotiated 
Smithsonian exchanges for duplicate reptiles of a collection 
purchased by Dr. Wilson and presented to the Academy. 
On his return he was busy over Stansbury’s collections 
from Utah, and planning collections to be made in Turkey 
by George P. Marsh. 
On the 28th of April he started for Cincinnati via 
Carlisle, to attend the meeting of the American Associa- 
tion, where he arrived May sth. His post was that of 
Permanent Secretary, but in the absence of the Treasurer, 
Dr. Elwyn, he was appointed to fill that position also. 
Having finished the Association work May toth, he went 
on to Cleveland, Buffalo and by way of Albany to New 
York. On the 20th he reached Washington. 
Early in June Mrs. Baird and Lucy returned to 
Carlisle on a visit to relatives. A large part of Baird’s 
time was taken up at this period by reading proof of the 
Encyclopedia, the American Association Report, and 
Smithsonian publications; and by making up the foreign 
exchanges of books and papers. June 2Ist he went to 
attend commencement at Dickinson College, Carlisle. 
From George P. Marsh to Spencer F. Baird. 
My pear Boy:— Carro, May 3, 1851. 
I arrived here a week since after an absence of three months in 
Upper Egypt and Nubia, and found your welcome letter of Feb. 9. 
I regret I had not heard from you earlier, or [ could have found you 
