The American Library of Congress have a site called 'American Memory - Historical Collections for the National Digital Library'. A quick search for 'lindy' and 'hop' gives you the option of scanned images of the original typed written pages discussing rent parties in Harlem in New York.

This article is really worth reading if you have any history in lindy hop, or in afro-american urban communities of the time. This rent parties article provides a nice complement to my brief history of lindy hop as an afro-american vernacular dance.