The John McCreary House (1869-70), Jackson's Clubhouse (1872), the Stockton Cottages (1872), the Windsor Hotel (1879), and the Atlantic Terrace Houses are among his most well-known structures in the city (1891-92). Samuel Sloan is thought to have acquired the plans for the George Allen House from a pattern book. The house was built according to those plans. He also designed several churches, including Saint Paul's Episcopal Church (1871) and Saint James' Roman Catholic Church (1875). He was elected chairman of the board of directors for the Philadelphia & New York Railroad in 1873 and held that position until his death. Jackson was also involved in many other projects in Cape May such as shops, houses, and hotels. Some historians believe he had a hand in at least twenty other buildings in the town. Jackson was a member of the American Institute of Architects and the National Academy of Design. Several museums around the country have paintings by him including the Pennsylvania Academy of the Fine Arts in Philadelphia and the Butler Museum of Art in Charleston, South Carolina. He died in 1889 at the age of sixty-three after having two more children. His wife Elizabeth died four years later at the age of forty-nine. They have been buried together in the Woodlands Cemetery in Philadelphia. Cape May has maintained its reputation as a health resort since its founding in 1785.