There were born of this marriage four children of whom the eldest daughter, Mary, married a native African who had been purchased from a slave ship by another planter in her neighborhood. This slave was of a devout nature, and early became a member of the Church of England, receiving at his baptism the name of Robert. After baptism, Robert's master set him free. It was, therefore, as a free man that he became the husband of Mary Banneker, whose surname he adopted for his own. Four children were born to Robert and Mary Banneker, one boy and three girls, the eldest being Benjamin, the subject of this sketch. Robert Banneker had evidently formed some of the habits of thrift evinced by his mother-in-law, Mollie Welsh, for it is on record that in 1737 within a few years after receiving his freedom he purchased a farm of 120 acres from Richard Gist, paying for it 17,000[152] pounds of tobacco, which in those days served as a legal medium of exchange. This farm, located on the Patapsco Eiver, within about ten miles of the town of Baltimore, thus became the Banneker homestead. Here it was that young Benjamin spent his early years and grew to manhood, assisting his father with the general work of the farm. Banneker very early showed signs of precocity, which made him the special favorite of his maternal grandmother who took delight in teaching him to the extent of her own limited mental endowment. She taught him to study the Bible, and had him read it to her at regular intervals for the purpose of training him along religious lines of thought. He attended a small school in his neighborhood where a few white and colored children were taught by the same white schoolmaster. Until the cotton gin and other mechanical appliances made Negroes too valuable as tools of exploitation to be allowed anything so dangerous as education, there were to be found here and there in the South pioneer educators at the feet of whom even Negroes might sit and learn.[153] As a boy at school young Banneker is said to have spent very little, if any, of his time in the games and frolics that constitute so large a part of the school life of the average youth. He was unusually fond of study, devoting by far the larger part of his time to reading, so that it was said of him that "all his delight was to dive into his books." His reading, however, did not take a wide range. His limited resources did not permit him to purchase the many works he desired. What Banneker lost through the lack of a variety of books, however, he tried to make up for in being a close observer of everything around him. He turned everything that he could into a channel of information and drew upon all possible sources to keep himself posted on the general activities of his community and beyond. In this way, "he became gradually possessed of a fund of general knowledge which it was difficult to find even among those who were far more favored by opportunity than he was."[154]