Letter from Oscar Wilde to Walt Whitman, March 1, 1882, Chicago, IL.
Partial transcription:
Before I leave America I must see you again—there is no one in this wide great world of America whom I love and honour so much. With warm affection, and honorable admiration, Oscar Wilde
For Wilde's second meeting with Whitman see notes at Philadelphia, May 10, 1882.
Source: : Library of Congress, Washington DC.