Such personal risks produced no effect on the stout heart of Sleeman, who continued, unshaken and undismayed, his unselfish labours.

In 1854 the long strain of forty-five years’ service broke down Sleeman’s strong constitution.  He tried to regain health by a visit to the hills, but this expedient proved ineffectual, and he was ordered home.  On the 10th of February, 1856, while on his way home on board the Monarch, he died off Ceylon, at the age of sixty-seven, and was buried at sea, just six days after he had been granted the dignity of K.C.B.

Lord Dalhousie’s desire to meet his trusted officer was never gratified.  The following correspondence between the Governor-General and Sleeman, now published for the first time, is equally creditable to both parties: 

                BARRACKPORE PARK,
                January 9th, 1856. 
 MY DEAR GENERAL SLEEMAN,
 I have heard to-day of your arrival in Calcutta, and have heard at the same time with sincere concern that you are still suffering in health.  A desire to disturb you as little as possible induces me to have recourse to my pen, in order to convey to you a communication which I had hoped to be able to make in person.  Some time since, when adjusting the details connected with my retirement from the Government of India, I solicited permission to recommend to Her Majesty’s gracious consideration the names of some who seemed to me to be worthy of Her Majesty’s favour.  My request was moderate.  I asked only to be allowed to submit the name of one officer from each Presidency.  The name which is selected from the Bengal army was your own, and I ventured to express my hope that Her Majesty would be pleased to mark her sense of the long course of able, and honourable, and distinguished service through which you had passed, by conferring upon you the civil cross of a Knight Commander of the Bath.  As yet no reply has been received to my letter.  But as you have now arrived at the Presidency, I lose no time in making known to you what has been done; in the hope that you will receive it as a proof of the high estimation in which your services and character arc held, as well by myself as by the entire community of India. 
            I beg to remain,
               My dear General,
                 Very truly yours,
                   DALHOUSIE.

Major-General Sleeman.

Reply to above.  Dated 11th January, 1856.

MY LORD,
 I was yesterday evening favoured with your Lordship’s most kind and
flattering letter of the 9th instant from Barrackpore. 
 I cannot adequately express how highly honoured I feel by the
mention that you have been pleased to make of my services to Her Majesty the Queen, and how much gratified I am by this crowning act of kindness from your Lordship in addition to the many favours I have received at your hands during the last eight years; and whether it may, or may not, be my fate to live long enough