Area 3 shows such an incredible history. In 1851, there was a separate tract of land bought from Peralta and given to James LaRue, under the name San Antonio. It was between 13th Street and 21st Street northwest; and 14th Avenue and 23rdAvenue southeast; and by 1853 it was already subdivided. By 1856 all three areas of San Antonio, Clinton, and Lynn were joined together to form Brooklyn.
By 1868, there was a 12th Street bridge that connected Oakland to Brooklyn. It was a huge amount of development all happening at the same time. It incorporated an Independence Square, along International Boulevard and 20th Avenue. There were huge parks designated between 16th Avenue and 18th Avenue, and Foothill Boulevard and 19th Avenue. At International Boulevard and 14th Avenue, there was a large wooden bridge over a lower creek of water flowing down. For two years, in 1872 to 1874, this area was actually the County seat.
The key to the building of this entire San Antonio area is the train system. It happened incredibly quickly. There was a substantial track that went from Downtown Oakland, across Lake Merritt, on Washington Street (called back then) all the way to 13th Avenue. Then it turned left going up the hill to 22nd Street, then one block to the south on 14th Street, going all the way to County Road ending at Fruitvale Avenue.