Sara Jane married the lawyer Thomas Mellon, patriarch of the banking family, in 1843. Upon the death of Jacob Negley in 1827, his widow Barbara built a new farmhouse for herself in 1829, which still stands and which gives its name to the "Farmhouse Park" playground within Highland Park. She also resolved certain debts that she and Jacob had incurred during the Panic of 1819 by selling some parcels of her land. In 1837, Barbara Winebiddle Negley divided the remainder of the estate among her children. This started the process of subdivision of land in East Liberty and Highland Park that led to the development of those neighborhoods in the later nineteenth century. With the subdivision of the estate, the County Surveyor, Robert Hilands, also laid out the first streets in the Highland Park area. He formally established Negley Avenue along the line of the country lane that connected Penn Avenue with the Negley homestead, laid out Hiland Avenue (named after himself until changed to “Highland” by the City in 1890) as the principal street running north out of the center of the village of East Liberty, and converted the Negleys’ principal east–west “Country Lane” into what is now called Stanton Avenue. In the first half of the nineteenth century, most of the development in the East End of Pittsburgh occurred in the East Liberty section. This growth was spurred on by the construction of the Pennsylvania Railroad's main line to Pittsburgh through the East Liberty Valley in 1852. By 1868, there was a population of about 5000 in the general vicinity of East Liberty. In that year, the municipalities east of Pittsburgh (the townships of Pitt, Peebles, Liberty, Collins and Oakland, and the borough of Lawrenceville) were annexed by the City of Pittsburgh as part of a campaign of expansion that tripled the size of the city and extended its boundaries south of the Monongahela River. Further transportation improvements followed the incorporation of East Liberty into the city. In 1870, the City Councils passed the Penn Avenue Act, which provided a mechanism for the paving of local streets, and in 1872 horse-drawn streetcar service was extended out of Pittsburgh to East Liberty. In addition, the city Water Commission purchased land and began construction in 1872 of a reservoir on the top of the hill at the head of Hiland Avenue that opened in 1879. The land purchases for the