As five of the Whitmers were "witnesses" to the existence of the plates, and David continued to be a person of influence in Mormon circles throughout his long life, information about them is of value. The prophet's mother again comes to our aid, although her account conflicts with her son's. The prophet says that David Whitmer brought the invitation to take up quarters at his father's, and volunteered the offer of free board and assistance. Mother Smith says that one day, as Joe was translating the plates, he came, in the midst of the words of the Holy Writ, to a commandment to write at once to David Whitmer, requesting him to come immediately and take the prophet and Cowdery to his house, "as an evil-designing people were seeking to take away his [Joseph's] life in order to prevent the work of God from going forth to the world." When the letter arrived, David's father told him that, as they had wheat sown that would require two days' harrowing, and a quantity of plaster to spread, he could not go "unless he could get a witness from God that it was absolutely necessary." In answer to his inquiry of the Lord on the subject, David was told to go as soon as his wheat was harrowed in. Setting to work, he found that at the end of the first day the two days' harrowing had been completed, and, on going out the next morning to spread the plaster, he found that work done also, and his sister told him she had seen three unknown men at work in the field the day before: so that the task had been accomplished by "an exhibition of supernatural power."* * "Biographical Sketches," Lucy Smith, p. 135.