1826

Sailed for Europe to introduce his drawings.


1827

Issued prospectus of his "Birds."


1828

Went to Paris to canvass. Visited Cuvier.


1829

Returned to the United States, scoured the woods for more material for his
biographies.


1830

Returned to London with his family.


1830-1839

Elephant folio, _The Birds of North America_, published.