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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, 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.