Upon the accession of Anne, Sir John took advantage of the general indemnity offered to those who had gone abroad with James the Second, and resolved to avail himself of this opportunity of returning home; but, unluckily, he was detained until a day after the act had specified, by the confinement of his wife, who was taken ill at Paris, and there, in November 1703, gave birth to a son, who afterwards succeeded to the baronetcy. Although there was some risk in proceeding, yet Sir John, trusting to the Queen's favourable disposition to the Jacobites, embarked, and with his wife and child reached London. There he was immediately committed to the Tower, but his imprisonment had a deeper source than the mere delay of a few weeks. The Queensbury plot at that time agitated the public, and produced considerable embarrassment in the counsels of state.[89] It appears that Sir John Maclean had taken no part in this obscure transaction which could affect his honour, or impair his chance of favour from Queen Anne; for, so soon as he was liberated, she bestowed upon him a pension of five hundred pounds a-year, which he enjoyed during the remainder of his life. For some years Sir John Maclean continued to divide his time between London and the Highlands, where he frequently visited his firm friend Sir Ewan Cameron of Lochiel, at his Castle of Achnacarry. His estates had not been materially benefited by the brief sunshine of King William's favour. Upon finding that Maclean had gone to St. Germains, that monarch had confirmed to the Duke of Argyle the former grant of the island of Tyrie, which the successors of the Duke have since uninterruptedly enjoyed until the present day. Its value was, at the time of its passing into the hands of the Campbells, about three hundred pounds sterling per annum.[90] The chief of the clan Maclean was certain never to escape the suspicions of the Government, after the death of Anne, during whose reign the Highlanders experienced an unwonted degree of tranquillity. Upon her demise the whole state of affairs was changed; and none experienced greater inconveniences from the vigilance of Government than Sir Ewan Cameron and his friend Maclean. Lochiel, as his biographer observes, "drank deeply of this bitter cup."[91] It was during one of Maclean's visits to Achnacarry, when in company with his now venerable friend, that the Governor of Fort William attempted to take him and Sir Ewan prisoners, but they made their escape. During the night of their flight, however, Sir Maclean caught a severe cold, which ended afterwards fatally.