"Forty-six years of incessant labour," observes a writer at this date, "have had their influence even on his powerful frame: he has received one of those terrible warnings believed to indicate the approach of paralysis.
With General Sleeman will depart the last hope of any improvement in the condition of the unhappy country of Oude.

Though belonging to the elder class of Indian officials, he has never been Hindooized.

He fully appreciated the evils of a native throne: he has sternly, and even haughtily, pointed out to the King the miseries caused by his incapacity, and has frequently extorted from his fears the mercy which it was vain to hope from his humanity." Later in the year.

General Sleeman went to the hills, in the hope of recruiting his wasted health by change of air and scene; but the expectation proved vain, and he was compelled to take passage for England.

But it was now too late: notwithstanding the best medical aid, he gradually sank, and, after a long illness, died on his passage from Calcutta, on the 10th February, 1856, at the age of sixty-seven.
His Indian career was, indeed, long and honourable his labours most meritorious.