As Mayor and also a Councilman of his home-town, he sought to have its public grounds properly ornamented and improved,but such not being responded to by the new citizens, his plan was only partially carried out. He expended, however, large sums in setting out vineyards and fruit-trees in the immediate vicinity, being the first to start vine-culture and wine-making on the north side of the bay. For several years, his wines and brandies took the first premium at the State Fairs, and at the Mechanics' Fairs in San Francisco.
Mariano Guadalupe Vallejo