I transmit a copy of a letter from Mr. José Cecilia Gonzales to Mr. Cyrus Sibley, which tends to corroborate the proof in your possession relative to the outrage at Tabasco on the brig Industry, together with a copy of a letter from Thomas P. Downer, the mate of the Industry, to Mr. Sibley, presenting an account for indemnity for his losses and detention in consequence of the prcoeedings of the authorities at Tabasco against the vessel in question. The validity of the claim of the mate will of course depend upon the illegality of the proceedings adverted to; but, if you shall be satisfied of the truth of the representations of the parties, you will present Mr. Downer's claim with those of the owner and master.