 Complete the following phrase:  In the late 19th century, Allegheny, Pennsylvania later annexed by Pittsburgh, became known for its stately homes, occupied by some of the areas wealthy families. One such area became known as the Mexican War Streets. It developed from land owned by William Robinson Jr., ex-mayor of the city of Allegheny, who subdivided the property into streets and lots in 1847. Surveys for the development were made by Alexander Hays. A number of the streets are named after battles and generals of the MexicanAmerican War, including Buena Vista Street, Monterey Street, Palo Alto Street, 