The collection comprises Arabic, English, Dutch, Italian, Portuguese and Spanish portolan charts (early 15th cent.-1741) covering the following areas:
- Atlantic Ocean, Mediterranean Sea, Adriatic Sea, Aegean Sea, Bay of Biscay, Black Sea
- Indian Ocean, Eastern Dutch East Indies, Madura, Java Sea, Lesser Sunda Islands, Malabar coast, South China Sea, Gulf of Siam, entrance to Canton, Straits of Taiwan
- Pacific Ocean
- Europe, South Africa, South and Central America and South East Asia.
The shelfmarks of the collection are as follows: MSS. Bodl. Add. E. 8-10; MS. C2:7 (23); MSS. Can. Ital. 140-4; MS. D1 (185) [1-13]; MS. Don. a. 4-5; MSS. Douce 390-1; MSS. K1 (110-11); MS. Marsh 294; MS. Rawl. B. 256.