A single page Inventory of the H.P. Lovecraft Collection, on the website of the Rhode Island Archival and Manuscript Collections Online. Very usefully annotated, and easily searchable by keyword.
HPL has discovered that he is descended from the Elizabethan astronomer John Field. “For one who has always had an eye for the heavens himself, this sure is quite a find!” [Lovecraft to Robert H. Barlow, 14th May 1936]