[1] The grant encompassed the area around Lake Merced in San Francisco and the present day Daly City neighborhoods of Westlake, and Serramonte.
His grandfather, Nicolás Galindo, had accompanied the De Anza Expedition as a settler in Las Californias province in 1776.
With the cession of California to the United States following the Mexican-American War, the 1848 Treaty of Guadalupe Hidalgo provided that the land grants would be honored.
The Greene brothers arrived in California around 1847, and squatted on part of Rancho Laguna de la Merced.
He was the representative of thirty property holders ("North San Mateo Settlers' Union") in the present day Colma area whose titles were in peril.