This collection consists of seven leather bound portfolios containing topographical drawings, maps, floor plans, notes and papers that the West brothers had created when working in the Maharashtra region of India in the mid to late 1800's. The main focus of the collection is the Kanheri Caves; a group of over 109 rock cut temples located in what is today the Sanjay Gandhi National Park on the western outskirts of Mumbai. The brothers studied these caves over the course of several decades, returning to the site many times to check and amend measurements, locations, and expand open their interpretation of the site. The remainder of the collection covers several other sites such as: Ajanta, Ellora and Daulatabad.

Documents concerning the Bedsa Caves which are situated about 8 miles southeast of Karla.. These are:

• No.1: A general description of the caves, dated 13 March 1862.
• No.2: A plan of the Caves, scale 15 feet to an inch.
• No.3: Drawings of some of the emblems and paintings in the Chaitya Cave, scale 2 inches to a foot.
• No.4: More drawings of emblems with notes.
• No.5: A drawing of a window and pilasters in Cave No.5, scale 1 inch to a foot.
• No.6: A printed description of The Caves of Bedsa.
• No.7: A draft description of the caves and inscriptions, dated August 1864.