The French cartel for the Cape of Good Hope had sailed two days when a packet boat arrived with despatches from Bayonne, and from the unusual degree of secrecy observed respecting them, some persons were willing to suppose that orders to set me at liberty formed part of their contents; of this, the most prudent mode to gain information was to wait patiently for the sailing of the English cartel for India, when my embarkation therein or being again left the sole British prisoner in the island, would afford a practical solution of the question.  In the time of waiting for this event, I revised some notes upon the magnetism of the earth and of ships, and considered the experiments necessary to elucidate the opinions formed from observations made in the Investigator; and I was thus occupied when, on March 13th [MARCH 1810], a letter came from Mr. Hope, the commissary of prisoners, to inform me that he had obtained the captain-general’s promise for my liberty, and departure from the island with him in the Harriet.  This unhoped for intelligence would have produced excessive joy, had not experience taught me to distrust even the promises of the general; and especially when, as in the present case, there was no cause assigned for this change in his conduct.

I dared not therefore allow my imagination to contemplate a meeting with my family and friends as likely to soon take place, nor to dwell upon any subject altogether English; the same preparation however was made for a departure, as if this promise were expected to be fulfilled.  It was reported that the Harriet would sail within a fortnight after two frigates and a sloop should have gone out upon a cruise; and as these ships sailed on the 14th, the official information of my liberty, if really granted, might be expected daily.

It will be believed that I sought on all hands to learn whether any thing had transpired from the government to bespeak an intention of suffering me to go in the cartel; but it was without success, and every person endeavoured to discourage the hope, with a friendly design of softening another probable disappointment.  They argued, that for general De Caen to let me go at this time, when I knew so much of the island and an attack upon it was expected, would be to contradict all the reasons hitherto given for my detention; and therefore, that unless he had received a new and positive order, he could not with any degree of consistency set me at liberty.  This state of suspense, between hope and apprehension, continued until the 28th, when an express from the town, sent by M. Pitot, brought the following welcome information from colonel Monistrol.

His Excellency the captain-general charges me to have the honour of informing you, that he authorises you to return to your country in the cartel Harriet, on condition of not serving in a hostile manner against France or its allies during the course of the present war.

Receive, I pray you, Sir, the assurance of the pleasure I have in making you this communication, and of the sentiments of perfect consideration with which I have the honour to be, etc.