There is also speculation that Townsend named the north-south streets after states which he had been to, with Pennsylvania Street (his home state) being an extra wide street. However, there is no record of Townsend ever having been to Texas or Florida, whose names appear as streets. The east-west county street names survived until 1895, but as the city expanded, the Post Office demanded a simplification of the street grids. Most of the county streets took the names of the numbered streets that connected them to downtown, but because they didn't all line up exactly, a few county streets survived (such as Mariposa and Alameda). By the standard of the mid-nineteenth century, Potrero Hill was not a convenient location to get to - it was still separated by Mission Bay, which was not yet filled in. Prospective buyers partly deemed Potrero Hill too far away and were wary of De Haro's uncertainty as legal owner of the land. As a result, only a few lots were sold. In late 1849, Don Francisco de Haro died, and he was buried in Mission Dolores. After the death of de Haro, squatters began to overtake Potrero Point. The de Haro family tried to maintain control of the land but the family's ownership was challenged legally. The case went all the way to the Supreme Court when in 1866 it ruled against the De Haro family. Residents of Potrero Point celebrated with bonfires after learning of the outcome, some of whom gained title to the lot where they squatted through the Squatter's Rights. Development eventually came in the early 1850s, not in the form of rich gold-miners envisioned by Townsend, but in a more blue-collar variety. PG&E opened a plant in Potrero Point in 1852. Not long after, a gunpowder factory (gunpowder is vital for gold mining) opened nearby; shipyards, iron factories, and warehouses followed. Potrero Point experienced a minor boom in housing as factory workers preferred to live nearby. The opening of the Long Bridge in the 1860s would drastically change the dynamics of Dogpatch and Potrero Hill. In 1862, President Abraham Lincoln signed into law the Pacific Railway Act that provided Federal government support for the building of the First transcontinental railroad. In anticipation of the railroad, San Francisco began work in 1865 to build the Long Bridge, to connect San Francisco proper through Mission Bay to Potrero Hill, Dogpatch and Bayview. Dogpatch, once deemed too far south, was suddenly a stone's throw away.