Hasumiyar Sansanin William yana kan Dutsen Dawson a tsohuwar cibiyar Cape Coast, a Yankin Tsakiyar Ghana. Ana kiran Hasumiyar Masarautar Cape Coast, kodayake ba ta cikin hadaddun Castle na Cape Coast. Yana da nisan mil 600 (mil 1⁄3) daga Masarautar. Burtaniya karkashin Gwamna Hope-Smith ne ya fara gina ginin a 1820, kuma aka sanya masa suna Smith's Tower. A cikin shekarun 1830, an sake gina shi tare da ƙarin kayan dindindin kuma an sake masa suna Sansanin William. Tun daga wannan lokacin, yana aiki azaman hasumiya. A halin yanzu, ginin yana ɗauke da ma'aikatan Gidan adana kayan tarihi na Ghana (GMMB). Ana kula da Sansanin William kuma yana buɗe wa baƙi. "Foghorn Publishing ... Lighthouse Explorer Database ... Cape Coast Castle Light > Lighthouse Digest". Lighthouse Digest. Retrieved 15 May 2019. Template:Cite rowlett van Dantzig, Albert (1980). Forts and Castles of Ghana. Sedco Publishing Limited. p. 74. ISBN 9964-720-10-6.