Captain William Snelgrave's A New Account of Some Parts of Guinea, and the Slave Trade, first published in 1734, is a work well known to historians of West Africa. The largest and most valuable section of it comprises a detailed account of voyages by the author in 1727 and 1730 to the ports of Whydah and Jakin on the Slave Coast, then recently conquered by Dahomey, and offers the earliest extended account of the latter kingdom to be published. The information in Snelgrave's book can also be supplemented by records of testimony which he provided on two occasions, in 1726 and 1731, before the Commissioners for Trade and Plantations in London.Snelgrave was a slave-trading captain with, at the time of his book's publication, some thirty years' experience of the West African trade. The details of his career are documented principally from his book, which in addition to the voyages of 1727 and 1730 (which form its principal subject), also alludes to several earlier slave-trading voyages undertaken by him. Snelgrave's first voyage to Africa, in which he served as purser on a ship commanded by his father, was to Old Calabar in 1704; a second voyage to Old Calabar was undertaken in 1713, a voyage to Sierra Leone (on which Snelgrave was captured by pirates) in 1719, and a voyage to the Gold Coast in 1721-22. This is not, however, a comprehensive catalog of Snelgrave's voyages, since he also alludes to having visited Whydah on “several voyages” before 1727. Other evidence documents two such earlier voyages by Snelgrave to Whydah, in 1717 and 1725. He was apparently still alive in 1735, the year after the publication of his book, when he is mentioned among a group of people involved in legal proceedings to press claims on the estate of Patrick West, a recently deceased merchant of Antigua.