Did the real Amy March get together with the real-life Laurie? Letters between May Alcott and Alf Whitman

Did the real-life Amy know Laurie? Apparently so, and they were good friends! How do we know? Through a stash of letters at the Houghton Library from May Alcott to Alfred Whitman. Who was Laurie based upon? Alf is one of two boys on whom Laurie from Little Women was based (the other being Louisa's …