Agassiz at Harvard, 



lOI 



Agassiz's expeditions were not confined to the sea. 

 In 1848 he organised a party made up of some of his 

 pupils, having as its objective the shores of Lake Su- 

 perior between Fort WiUiam and Sault Sainte Marie. 

 The trip Hngered long in the memory of those who 

 made it. Here Agassiz was at his best, discussing 

 and teaching as he investigated. Once upon the 

 ground the party camped, the evenings being de- 

 voted to lectures from Agassiz or discussions on the 

 observations of the day. Here he renewed his 

 glacial studies and expounded to his young friends 

 his favourite theories, which found abundant ex- 

 pression. 



The entire Superior region was worked up in a 

 manner novel and telling. The country was accur- 

 ately surveyed, while the fishes of the lake were 

 represented in a fine collection. The complete 

 account of the trip was afterwards published, and 

 stands to-day the most exhaustive treatise on the 

 locality ever made. 



During this year Agassiz issued his Principles of 

 Zoology^ written conjointly with Gould, — a work that 

 had a remarkable sale and is selling to-day. Agassiz 

 still had an idea that he might return to Europe, 

 but in 1850 an event occurred which undoubtedly 

 settled the question. This was his marriage with 

 Elizabeth Graves Gary, the gifted woman who now 

 survives him. 



The question of a museum was ever uppermost in 

 Agassiz's mind, and one day he received a letter 

 which seemed an inspiration in this direction, an 

 opportunity to add greatly to his collections. The 



