THE YOUNG PROFESSOR 123 
Therefore, Dear Spencer, as you have mounted the first step, I most 
sincerely pray and hope your progress may be steadily onward and 
sure. And should you, before you reach the Topmost Towering 
hight of this arduous ascent require a little propping or helping up, 
your grandmother’s hand shall be extended to you as long as she 
has the power. 
On the 13th he left Carlisle for another visit to S. S. 
Haldeman. 
He met there Dr. J. G. Morris, Dr. Melsheimer, Dr. 
Zeigler of York, and Miss Helen Lawson, the daughter 
of Alexander Lawson who engraved the plates of Wilson’s 
Ornithology and, later, many of those of the Wilkes 
Exploring Expedition and Dr. Amos Binney’s Terrestrial 
Mollusks of the United States. She was making drawings 
of shells for Mr. Haldeman which were afterward engraved 
by her father. 
The Entomological Society of Pennsylvania met at 
Haldeman’s during Baird’s visit and elected him a mem- 
ber. On the 2nd of August he reached home again. 
Cassin had written him for some extracts from a 
serial not accessible at the time in Philadelphia, the 
work was done by Baird and subsequently he received 
a letter from which the following extracts are taken: 
From John Cassin to S. F. Baird. 
Puitap’a. § August, 1845. 
Dear Barrp,— 
My dear fellow,—I had not the slightest idea of imposing such 
a task upon you. My impression was that there might be some half- 
dozen descriptions in Revue Zool.—not the slightest idea of such a 
job. You say you spent two or three days quite pleasantly at Halde- 
man’s—I think so—copying descriptions of Humming birds. 
We have a new member at the Academy, Doctor Leidy, who is an 
anatomist especially, and is now making dissections and drawings 
