During his 1792 journey aboard "Columbia Rediviva", Gray noticed muddy waters flowing from shore and decided to investigate whether he might have encountered the "Great River of the West". While waiting for favorable weather, on April 29, Gray spotted a ship and exchanged greetings with her. This ship was , commanded by British naval officer Captain George Vancouver. The two captains met and discussed the geography of the coastlines: Gray told Vancouver about the large river he had attempted to enter in 1788, but Vancouver doubted a large river was at that latitude. So Gray continued south, leaving the Strait of Juan de Fuca on April 30, 1792, trading for more pelts as the ship sailed. On May 7, he took "Columbia Rediviva" into the estuarine bay of Grays Harbor, Washington. (Gray himself actually named this Bullfinch Harbor, but Vancouver's after-the-fact choice was the name that stuck.)