On July 12th, 1804, he wrote to Sir Joseph Banks:—­

“Since my imprisonment in this island I have written to you, Sir Joseph, several letters, and by several conveyances.  Some of them must no doubt have been received.  General de Caen still keeps me closely confined, but he has lately given me the greater part of my books and papers, and, therefore, I shall again be able to proceed in preparing the accounts of our discoveries.

“I have now been kept in prison seven months.  The time passes drearily along, and I have yet to remain five months longer before any orders are likely to be received concerning me from the French Government; and then it is uncertain of what nature they may be, since it is not known what statement the General has made of my particular case; and probably the vessels carrying the despatches will be taken, and the letters thrown overboard, in which case it cannot be guessed how long I may be kept.  My dependence, therefore, is on the Admiralty demanding me to be given up, by virtue of the French passport, in which, even here it is acknowledged, there has been no infringement on my part further than in intention, which intention has been misconstrued and misunderstood by a man violent against the name of an Englishman, and ignorant of what relates to voyages of discovery.

“This arbitrary man is now doing me the greatest injury without even making a plea for it.  His own subjects (for he is a most despotic monarch), Frenchmen, who are acquainted with the circumstances, condemn him for it; but the generality cannot believe that the commander of a voyage of discovery, whose labour is calculated for the good of all nations, should be kept a prisoner without something greatly wrong on his part; and, since no crime is charged against me, it is currently reported here that I have not the requisite papers to prove my identity.

“I hope, Sir Joseph, that, even from the charts which I have sent home, you will think we did as much as the lateness of the season with which we first came upon the coast, and the early rottenness of the Investigator could well allow; and I think our labours will not lose on a comparison with what was done by the Geographe and Naturaliste.  No part of the unfortunate circumstances that have since occurred can, I believe, be attributed to my neglects or mistakes; and therefore I am not without hope that, when the Admiralty know I am suffering an unjust imprisonment, they will think me worthy to be put upon the post-captains’ list.  My age now exceeds the time at which we judge in the navy a man ought to have taken his station there who is to arrive at anything eminent.  It would soften the dark shade with which my reflections in this confinement cannot but be overspread to know that I was promoted to the list where my rank would be progressive.  It is to you only, Sir Joseph, that I can address upon this subject.