On Wednesday last, I despatched from this port, in a French passage-steamer for Cadiz, on business connected with this ship, my Paymaster, Mr.Henry Myers, and Mr.T.T.Tunstall, a citizen of the Confederate States, and ex-United States Consul at Cadiz.

The steamer having stopped on her way at Tangier, and these gentlemen having gone on shore for a walk during her temporary delay there, they were seized by the authorities, at the instigation of the United States Consul, and imprisoned.

A note from Paymaster Myers informs me they are both heavily ironed, and otherwise treated in a barbarous manner.
I learn further that the pretence upon which the unlawful proceeding was had, is, that it is authorized by treaty stipulation with the United States.

Unfortunately I have not a copy of this treaty in my possession; but I presume it provides in the usual form, for the extradition of criminals, and nothing more.

I need not say to his Excellency that treaties of this description are never applied to political offenders--which I presume is the only category in which the United States Consul pretends to place these two gentlemen.