Tom Thurnall stayed his month at home, and then went to America; whence he wrote home, in about six months, a letter, of which only one paragraph need interest us, "Tell Mark I have no need for his dollars. I have done the deed; and, thanks to the underground railway, done it nearly gratis; which was both cheaper than buying her, and infinitely better for me; so that she has all poor Wyse's dollars to start with afresh in Canada. I write this from New York. I could accompany her no farther; for I must get back to the South in time for the Mexican expedition." Then came a long and anxious silence; and then a letter, not from Mexico but from California,--one out of several which had been posted; and then letters, more regularly from Australia. Sickened with Californian life, he had crossed the Pacific once more, and was hard at work in the diggings, doctoring and gold-finding by turns. "A rolling stone gathers no moss," said his father. "He has the pluck of a hound, and the cunning of a fox," said Mark; "and he'll be a credit to you yet." And Mary prayed every morning and night for her old playfellow; and so the years slipped on till the autumn of 1853. As no one has heard of Tom now for eight months and more (the pulse of Australian postage being of a somewhat intermittent type), we may as well go and look for him. A sheet of dark rolling ground, quarried into a gigantic rabbit burrow, with hundreds of tents and huts dotted about among the heaps of rubbish; dark evergreen forests in the distance, and, above all, the great volcanic mountain of Buninyong towering far aloft--these are the "Black Hills of Ballarat;" and that windlass at that shaft's mouth belongs in part to Thomas Thurnall. At the windlass are standing two men, whom we may have seen in past years, self-satisfied in countenance, and spotless in array, sauntering down Piccadilly any July afternoon, or lounging in Haggis's stable-yard at Cambridge any autumn morning. Alas! how changed from the fast young undergraduates, with powers of enjoyment only equalled by their powers of running into debt, are those two black-bearded and mud-bespattered ruffians, who once were Smith and Brown of Trinity. Yet who need pity them, as long as they have stouter limbs, healthier stomachs, and clearer consciences, than they have had since they left Eton at seventeen? Would Smith have been a happier man as a briefless barrister in a dingy Inn of Law, peeping now and then into third-rate London society, and scribbling for the daily press! Would Brown have been a happier man had he been forced into those holy orders for which he never felt the least vocation, to pay off his college debts out of his curate's income, and settle down on his lees, at last, in the family living of Nomansland-cum-Clayhole, and support a wife and five children on five hundred a-year, exclusive of rates and taxes? Let them dig, and be men.