Many old and rare books related to South Asia, such as travelers' accounts, are found in the Special Collections Department. Its archives include papers of prominent South Asia scholars. Search for archival materials and finding aids in the Library Catalog.
The site offers bibliographic information and digital facsimiles for selected collections of manuscripts held by the University of Pennsylvania. There are 2880 Indic manuscripts (mainly in Sanskrit) in the collection.
The Libraries & Archives in South Asia (LASA) wiki is a collaborative effort to compile a guide to South Asian libraries and archives for academics and researchers in the humanities and social sciences.
Search here to view details of the British Library's archive and manuscript collections.
Not all records for these collections are online, so be sure to consult the BL's other archive and manuscripts catalogues.