 Captain John Meares, during his 1788 exploration of the Pacific Northwest, had on board a copy of a Spanish map made by Francisco Antonio Mourelle and Juan Francisco de la Bodega y Quadra which showed the Columbia River's mouth as "Entrada descubierta por Dn Bruno Hezeta".On July 6, aboard the 230-ton snow "Felice Adventurer", Meares sailed off the mouth of the river at the latitude indicated on the Spanish map, but was unable to find the mouth.He did see the cape on the north side of the entrance and named it Cape Disappointment, reflecting his failure to find the river's mouth.