Boswell had a free hand as a writer for the London Magazine, in which he had a proprietary interest. To it he contributed the following account, accompanied with a portrait—the source of much of Macaulay's indictment. 'One of the most remarkable masks upon this occasion was James Boswell, Esq., in the dress of an armed Corsican chief. He entered the amphitheatre about twelve o'clock. He wore a short dark-coloured coat of coarse cloth, scarlet waistcoat and breeches, and black spatterdashes; his cap or bonnet was of black cloth; on the front of it was embroidered in gold letters viva la liberta, and on one side of it was a handsome blue feather and cockade, so that it had an elegant as well as a warlike appearance. On the breast of his coat was sewed a Moor's head, the crest of Corsica, surrounded with branches of laurel. He had also a cartridge-pouch, into which was stuck a stiletto, and on his left side a pistol was hung upon the belt of his cartridge-pouch. He had a fusee slung across his shoulder, wore no powder in his hair, but had it plaited at full length with a knot of blue ribbons at the end of it. He had, by way of a staff, a very curious vine all of one piece, emblematical of the sweet bard of Avon. He wore no mask, saying it was not proper for a gallant Corsican. So soon as he came into the room he drew universal attention. The novelty of the Corsican dress, its becoming appearance, and the character of the brave nation concurred to distinguish the armed Corsican chief. He was first accosted by Mrs Garrick, with whom he had a good deal of conversation. There was an admirable dialogue between Lord Grosvenor, in the character of a Turk, and the Corsican on the different constitution of the countries so opposite to each other,—Despotism and Liberty; and Captain Thomson, of the navy, in the character of an honest tar, kept it up very well; he expressed a strong inclination to stand by the brave islanders. Mr Boswell danced both a minuet and a country dance with a very pretty lady, Mrs Sheldon, wife to Captain Sheldon, of the 38th Regiment of Foot, who was dressed in a genteel domino, and before she danced threw off her mask.'

He adds a cool puff of his own verses, 'which, it is thought, are well suited to the occasion, while at the same time they preserve the true Corsican character.' About a month after this masquerade, Goldsmith dined at Boswell's lodging with Garrick, Johnson, Davies, and others, where 'Goldsmith,' says the biographer, 'strutted about, bragging of his dress, and I believe was seriously vain of it, for his mind was wonderfully prone to such impressions!' Bozzy could criticise, as on all occasions, the bloom coloured coat of 'honest Goldsmith,' yet he was eager for Garrick to fall in with the idea of the tradesmen of Stratford to make the Jubilee an annual event in the interests of local trade, and 'I flatter myself with the prospect of attending you at several more Jubilees.'

Though he had again commenced in London his attendance on Johnson and note-taking, there was now a divided source of attraction. Things had gone hard with Paoli since Boswell had been in the island. In spite of his Irish brigades and his British volunteers, the overwhelming forces which the French were able to put in the field, on the cession of the island to them by the Genoese, brought to an end the stubborn resistance of the inhabitants. In the August of 1768 Boswell had raised in Scotland a subscription of £700 for ordnance furnished by the Carron Iron Work Company, and in 1769 there had issued from the press a little duodecimo, 'British Essays in favour of the Brave Corsicans: collected and published by James Boswell, Esq.' The papers are twenty in number, some by himself, others by 'a gentleman whose name would do honour to any cause (whom we think to have been Trecothick, the successor of Beckford, as Lord Mayor of London), and the greatest part furnished by persons unknown to me.' They deal with the dangers to trade from France and the Bourbon Compact, and point at the value of Corsica as a station superior to Gibraltar or Minorca. One paper signed 'P. J.' has the undoubted Boswellian touch in dealing with the sailors thrown idle by the cessation of the along-shore Mediterranean trade. 'None are less avaricious than our honest tars, nor have they, in reality, any reason to be discontented. Every common sailor has at least five and thirty shillings a month, over and above which he has his victuals and drink, and that in great abundance. There is no such thing as stinting aboard a ship, unless when reduced to difficulties by stormy weather. The crew have their three meals a day regularly, and if they should be hungry between meals, there is always a biscuit or a luncheon of something cold to be had.'

France had bought Corsica from Genoa in May 1768. Marbœuf, whom Boswell had found in the island, had been superseded, and a descent of the French under Count Vaux with 20,000 men ended the war. Paoli escaped to a ruinous convent on the shore, and, after lying there in concealment, he embarked on an English vessel bound for Leghorn. On September 20th he reached London, and the Public Advertizer of October 4th, through its faithful correspondent, informed its readers how 'On Sunday last General Paoli, accompanied by James Boswell, Esq., took an airing in Hyde Park in his coach.' On the evening of the 10th he was presented by the traveller to Johnson, who was highly pleased with the lofty port of the stranger and the easy 'elegance of manners, the brand of the soldier, l'homme d'épée.'

An impression is abroad that Boswell's books were not taken seriously. Nothing could be more remote from the truth. The Whigs were in favour of his views, and Burke, together with Frederick the Great, believed our interests would suffer by the increase of French power in the Mediterranean. Shelburne, for Chatham had resigned before November 1768, was the advocate of similar views, telling our ambassador at Versailles to remonstrate with the French court, while Junius, in his letter to the Duke of Grafton, told the country that Corsica would never have been invaded by the French, but for the sight of a weak and distracted ministry. When the hand of Napoleon was heavy on the Genoese, they remembered that their cession of the island had made their master, by his birth at Ajaccio on August 15, 1769, a Frenchman. But the nation at the time of Boswell's books was weary of war, and their influence, though great, was not visible in any actual political results.

Boswell had expected to draw the sage on the subject of matrimony, having promised himself, as he says, a good deal of instructive conversation on the conduct of the married state. But the oracles were dumb. On his return to the north he was married, on the 25th November 1769, to his cousin. We find in the Scots Magazine of that month the following extracts under the list of marriages:—

'At Lainshaw, in the shire of Air, James Boswell, Esq., of Auchinleck, advocate, to Miss Peggy Montgomery, daughter of the late David Montgomery of Lainshaw, Esq.'

'At Edinburgh, Alexander Boswell, Esq., of Auchinleck, one of the Lords of Session and Justiciary, to Miss Betty Boswell, second daughter of John Boswell, Esq., of Balmuto, deceased.'

His father, now past sixty, had married again, and married a cousin for the second time, like his son on the present occasion. That they were married on the same day and at different places affords a clear indication that the father and son were no longer on the best of terms.