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 I3th 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. 



PHILAD'A. 5 August, 1845. 

 DEAR BAIRD, 



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 



