Collection Manuscript/Mixed Material Image 1 of Item 1. Letter from Sultan Ahmad ibn Sultan Zainal Abidin of Terengganu to Major William Farquhar. Resident of Melaka. 19 Muharram 1234 (18 November 1818). Item 1. Letter from Sultan Ahmad ibn Sultan Zainal Abidin of Terengganu to Major William Farquhar. Resident of Melaka. 19 Muharram 1234 (18 November 1818).