On reaching Sutter 's Fort he had completed one of the first overland wagon journeys to California .
In 1844 Greenwood , along with Isaac Hitchcock , guided the influential Stephens - Townsend - Murphy Party across the Sierra Nevada mountain range .
On reaching Sutter 's Fort Isaac Hitchcock had completed one of the first overland wagon journeys to California .
In 1844 Greenwood , along with Isaac Hitchcock , guided the influential Stephens - Townsend - Murphy Party across the Sierra Nevada mountain range .