Mezue ahịrịokwu na-esonụ: A mụrụ James Walker n'afọ 1764, nwa James Walker nke Innerdovat, Fife na nwunye ya onye edemede, Mary Leslie, nwa nwanyị nke atọ nke Alexander Melville, 5th Earl nke Leven. Ọ banyere n'ụgbọ mmiri dị ka onye na-agba ụgbọ mmiri n'ụgbọ mmiri nwere egbe 32 na 18 Disemba 1776, na-eje ozi n'okpuru Captain William Garnier. Ọ gara Jamaica na Jenụwarị 1777, mana ọ laghachiri na mmiri ndị Britain maka ọrụ na North Sea na mgbe ahụ ọwa mmiri Bekee na ụgbọ mmiri Sir Charles Hardy n'oge Agha Great Britain.
nsogbu mbuso agha na 1779. Ka ọ na-eje ozi na Channel n'afọ 1780, "Southampton" jidere otu ụgbọ mmiri ndị France nwere egbe 18 n'akụkụ Portland, ya na ndị ikom 80 nọ n'ụgbọ ya. E zigara Walker ka ọ gaa nyere aka wepụ ndị mkpọrọ, ma mgbe o mechara nke ahụ, ọ nọgidere n'ụgbọ iji nyere aka na ballast na pumping, ebe ọ bụ na ụgbọ mmiri ahụ nọ n'ihe ize ndụ nke imikpu. N'agbanyeghị mgbalị ndị ọ na-eme, ụgbọ mmiri ahụ kpuru na mberede, ọ fọkwara nke nta ka o buru Walker. Ọ nọrọ n'ime mmiri ruo minit iri tupu a napụta ya.