Thomas’s eldest son, John Carter Allen, calling himself John Hay Allan, had apparently already been in Scotland for some time and in 1822 he published a volume of poems, "Bridal of Caolchairn, and other poems" (London, 1822) dedicated to the Duke of Argyll, and revealing a fair knowledge of that county but including several allusions to his claimed descent from the Hays of Errol. From 1826 to 1829, John joined his brother Charles at Windy Hill (now Milton Brodie), Alves, Morayshire, under the patronage of the Earl of Moray. The brothers were at Logie House, Edinkillie, Morayshire, from 1829 to 1838, when John used the name Stuart Allan. As John Sobieski Stuart he and his brother, calling themselves ‘grandsons to the Pretender’, had visited Ireland in May 1836. Lord Lovat then built ‘an antique shooting lodge’ for them on Eilean Aigas, an islet in the river Beauly, near Eskadale, Inverness, and there, always wearing the Stuart tartan, they held court from 1838 to 1845, attending the catholic church at Eskadale and being known as ‘the Princes’. The house is described as ‘a very elegant mansion of the Elizabethan style’ in the "New Statistical Account of Scotland" (1842). On 18 October 1845, John married at St Martin-in-the-Fields, Westminster, Georgina, eldest surviving daughter of Edward Kendall, J.P., of Austrey, Warwickshire. She had, he told Robert Chambers, ‘only ten thousand pounds, unless she survives her two sisters, who equally share with her’, but the couple then moved to live in London. In his letter to Chambers just prior to the marriage John asked for a loan of £100 until his wife’s dividends were paid but when his father-in-law eventually died in March 1872 the total estate was sworn at ‘Under £1,500’ and later as ‘Under £2,000’.