Boehler and his company expected to find Spangenberg and Bishop Nitschmann in Pennsylvania, and were much disappointed to learn that both were absent. They scarcely knew what to do, but Boehler held them together, and when Whitefield decided to buy a large tract of land and build thereon a Negro school, and a town for his English friends of philanthropic mind, and when the Moravians were offered the task of erecting the first house there, Boehler and his companions gladly accepted the work. Bethlehem followed in due time, and all were among those who organized that congregation. David Zeisberger, Sr., died there in 1744, his wife in 1746. Anton Seifert was appointed Elder, or Pastor of the Bethlehem Congregation, married, and took an active part in the Church and School work there and at Nazareth, the latter tract having been purchased from Whitefield in 1741. April 8th, 1745, he sailed for Europe, laboring in England, Ireland and Holland, and dying at Zeist in 1785. John Martin Mack became one of the leaders of the Moravian Church in its Mission work among the Indians in New York, Connecticut and Ohio until 1760, when he was sent to the negro slaves on St. Thomas, preaching also on St. Croix and St. Jan, and the English West Indies. He was ordained to the ministry November 13th, 1742, and was consecrated bishop October 18th, 1770, during a visit to Pennsylvania, this being the first Episcopal consecration in the American Province of the Moravian Church. He was married four times, his last wife passing away two years before his departure. He died June 9th, 1784, and was buried in the presence of a great concourse of people,--negro converts, planters, government officers and the Governor-General.