The great grandfather of the biographer was the Earl of Kincardine who is mentioned by Gilbert Burnet in his _History of His Own Time_. He had married a Dutch lady, of the noble house of Sommelsdyck who had once held princely rank in Surinam. With that branch also of the name did Boswell, in later years, establish a relationship at the time of his continental tour, when at the Hague he found the head holding 'an important charge in the Republick, and is as worthy a man as lives, and has honoured me with his correspondence these twenty years.' From the Earl Boswell boasted 'the blood of Bruce in my veins,' a descent which he seizes every opportunity of making known to his readers, and to which we find him alluding in a letter of 10th May, 1786, now before us, to Mickle, the translator of the _Lusiad_, with a promise to 'tell you what I know about our common ancestor, Robert the Bruce.' When Johnson, in the autumn of 1773, visited the ancestral seat of his friend, Boswell, 'in the glow of what, I am sensible, will in a commercial age be considered as a genealogical enthusiasm,' did not forget to remind his illustrious Mentor of his relationship to the Royal Personage, George the Third, 'whose pension had given Johnson comfort and independence.' It would have required a much greater antiquarian than Johnson, who could scarcely tell the name of his own grandfather, to have traced the well-nigh twenty generations of connecting links between Bruce and the third of the Guelph dynasty on the throne. From Veronica Sommelsdyck, the wife of this royal ancestor (whose title is now merged in the earldom of Elgin), was 'introduced into our family the saint's name,' born by Boswell's own eldest daughter, and other consequences of a much graver nature were destined to ensue. 'For this marriage,' says Ramsay of Ochtertyre, 'their posterity paid dear,' for to it was due, increased no doubt as it was through the inter-marriages in close degrees between various scions of the house, the insanity which is now recognised by all students of his writings in Boswell himself, and which made its appearance in the clearest way in the case of his second daughter. His grandfather James adopted the profession of law in which he obtained some distinction, and left three children--Alexander, the father of the subject of this sketch, John, who followed the practice of medicine, and a daughter Veronica, married to Montgomerie of Lainshaw, whose daughter became the wife of her cousin Bozzy.