English martyr, b. about 1560; hanged, drawn, and quartered at York, 16 November, 1594. Son of Thomas Osbaldeston, and nephew of Edward Osbaldeston, of Osbaldeston Hall, Blackburn, Lancashire, he went to the English College of Douai, then at Reims, where he was ordained deacon in December, 1583, and priest 21 September, 1585. He was sent on the mission 27 April, 1589, and was apprehended at night through the instrumentality of an apostate priest named Thomas Clark at an inn at Tollerton, Yorkshire, upon St. Jerome's day, 30 September, 1594. He had said his first Mass on the feast day of St. Jerome, and in consequence had a great devotion to the saint. The day following his arrest he was taken to York, where he was tried at the next assizes and attainted of high treason for being a priest. Bishop Challoner prints the greater part of a letter addressed by the martyr to his fellow-prisoners in York Castle, the full text of which is still extant, and which reveals the great humility and serene trust in God with which he anticipated his death.
Challoner, Memoirs of Missionary Priests, I no. 106; Knox, First and Second Douay Diaries (London, 1878); Catholic Record Society's Publications, IV (London, 1907); Bibl. Dict. Eng. Cath., V.
John B. Wainewright.