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approval of Slavery Arrival at New York of his Two Assistants, 

 Desor and Girard - - Establishment at East Boston Sickness of 

 Agassiz His Hospitality A Visit to Niagara Falls On Board 

 the United States Coast Survey Steamer, the Bibb Arrival of 

 Minister Charles Louis Philippe Christinat First Difficulties with 

 his Secretary --Two letters to J. Marcou, extending an Invitation 

 to join him ........... 279 



