Robert Nelson was born in 1656. In his early boyhood he was at St. Paul's School, but the greater part of his education was received under the guidance of Mr. Bull, afterwards Bishop of St. Davids, by whose life and teaching he was profoundly influenced. The biography of his distinguished tutor occupied the labour of his last years, and was no doubt a grateful offering to the memory of a man to whom he owed many of his best impressions. About 1679 he went to London, where he became intimate with Tillotson, then Dean of Canterbury. In later years this intimacy was somewhat interrupted by great divergence of views on theological and ecclesiastical subjects; but a strong feeling of mutual respect remained, and, in his last illness, Tillotson was nursed by his friend with the most affectionate love, and died in his arms. In 1680 Nelson went to France with Halley, his old schoolfellow and fellow member of the Royal Society, and during their journey watched with his friend the celebrated comet which bears Halley's name. While in Paris he received the offer of a place in Charles II.'s Court, but took the advice of Tillotson, who said he should be glad 'if England were so happy as that the Court might be a fit place for him to live in.'[1] He therefore declined the offer, and travelled on to Rome, where he made the acquaintance of Lady Theophila Lucy and married her the next year. It was no light trouble to him that on their return to London she avowed herself a Romanist. Cardinal Howard at Rome, and Bossuet at Paris, had gained her over to their faith, and with the ardour of a proselyte she even entered, on the Roman side, into the great controversy of the day. Robert Nelson himself was entirely unaffected by the current which just at this time seemed to have set in in favour of Rome. He maintained, indeed, a cordial friendship with Bossuet, but was not shaken by his arguments, and in 1688 published, as his first work, a treatise against transubstantiation. Though controversy was little to his taste, these were times when men of earnest conviction could scarcely avoid engaging in it.[2] Nelson valued the name of Protestant next only to that of Catholic, and was therefore drawn almost necessarily into taking some part in the last great dispute with Rome.[3] But polemics would be deprived of their gall of bitterness if combatants joined in the strife with as much charity and generosity of feeling as he did.[4]