The heaviest of all his tribulations now fell upon him. His son Samuel, about sixteen years old, had been kept at Montreal under the tutelage of Father Meriel, a priest of St. Sulpice. The boy afterwards declared that he was promised great rewards if he would make the sign of the cross, and severe punishment if he would not. Proving obstinate, he was whipped till at last he made the sign; after which he was told to go to mass, and on his refusal, four stout boys of the school were ordered to drag him in. Williams presently received a letter in Samuel's handwriting, though dictated, as the father believed, by his priestly tutors. In this was recounted, with many edifying particulars, the deathbed conversion of two New England women; and to the minister's unspeakable grief and horror, the messenger who brought the letter told him that the boy himself had turned Catholic. "I have heard the news," he wrote to his recreant son, "with the most distressing, afflicting, sorrowful spirit. Oh, I pity you, I mourn over you day and night. Oh, I pity your weakness that, through the craftiness of man, you are turned from the simplicity of the gospel." Though his correspondence was strictly watched, he managed to convey to the boy a long exposition, from his own pen, of the infallible truth of Calvinistic orthodoxy, and the damnable errors of Rome. This, or something else, had its effect. Samuel returned to the creed of his fathers; and being at last exchanged, went home to Deerfield, where he was chosen town-clerk in 1713, and where he soon after died.[69]