Mr. Dayton to Mr. Seward.

No. 363.]

Sir: In further confirmation of the fact charged against Mr. Annan, naval constructor at Bordeaux, that he is extensively engaged in building war-vessels for the rebels of the south, I yesterday left with Mr. Drouyn de l’Huys what purports to be the copy of a letter from Mr. Arman to “Monsieur Maury, Contre-Amiral des Etats Confedérés d’Amérique,” (Rear-Admiral of the Confederate States of America,) dated 12th June last, a translation of which I herewith enclose to you.

The evidence against Arman was complete without this letter; but it seems to me that this precludes him from any pretence to be made to his own government, that when he applied for authority to arm these vessels, he was ignorant of the purposes to which they were to be applied, or that the agents for their construction having represented them to be for use in the China seas, he supposed such representations true. He here offers to Captain Maury, of the confederate navy, to construct, within a very short time, six iron-clad ships, with double turrets, of the force and character therein described, and at the prices therein stated. We had already produced to Mr. Drouyn de l’Huys the copy of an agreement, dated subsequent to this offer, (to wit, 16th July,) between Capt. Bullock and Arman, for building two vessels, in addition to the four contracted for by the agreement of the 15th of the preceding April. We thus have the clearest possible evidence that Arman, and those employed by him, are building at least six vessels-of-war; and it is not improbable that contracts may exist for others.

It is due to Mr. Drouyn de l’Huys to say that he has not questioned the entire sufficiency of the evidence. In another despatch I enclose to you a written answer from him, as well as one from the minister of marine.

I am, sir, your obedient servant,

WM. L. DAYTON.

Hon. William H. Seward, Secretary of State.

[Translation.]

Monsieur Arman to Captain Maury.

Monsieur l’Amiral: I come to submit to you the definitive plan of a gunboat battery, made out upon the programme which Monsieur the captain of the frigate Jamsen, has made known to me, and upon which I have already furnished to him some summary information.

[Page 792]

To attain the end which you have proposed to yourself, to carry upon the deck two iron-clad turrets, (blokaus blindés,) enclosing, each, two cannon of heavy calibre, I have been obliged to cause the primitive plan to undergo several important modifications. I have been obliged to carry the displacement from 1,280 tons to 1,358 tons, and, besides, to calculate that, upon a normal supply of 180 tons of coal, which shall be completed at departure by 30 tons, producing an overcharge of 7 centimetres, in fine, the weight of the plating (blindage,) calculated firstly at 320 tons, is raised to 389 tons.

These changes produce the distribution of weight as follows:

Weight of hull 510.000 k.
Engine 154.000
Plating mattress and screw 389.000
Combustibles 180.000
Cannon and accessories 50.000
Rigging and crew furniture and spare stores 75.000
Total 1,358.000

Upon these new conditions the price of the vessel would be raised, not including the artillery and its accessories, to one million seven hundred and fifty thousand francs, and the time necessary to the construction would be eight months, on account of the execution and the more difficult putting in place of the plating.

The vessel which I propose to you is, in fine, a complete ship, and I engage myself in the delay of one month, after the signing of the agreement, to furnish you the proof of the authorization of exit of the armament which you shall have to put upon the ship.

In fine, I repeat to you, admiral, the proposition which I have made to Mr. Jansen, to construct upon the same type, in a very short delay, six vessels of the same kind.

I will have the honor to present myself Tuesday morning at your house, and, in the mean time, I cause to be transmitted to you herewith the plans of the vessel, and a project of the contract, in order that you may have had time to examine them.

Be pleased to accept, admiral, the assurances of my high consideration.

ARMAN.

Captain Maury, Rear-Admiral of the Confederate States of America.

Cannon Boat Battery of 220.

Details of the weight of the cuirass, mattress, and screw, distributed over the hull, the forward turret and the back turret.

Hull 293.270 k.
Forward turret 49.328
Back turret 47.104
Total 389.702

Distribution of the weight.

[Page 793]
Weight of hull 510.000 k.
Do. engine and boilers, water included 154.000
Do. plaiting of hull, turrets, &c 389.000
Weight of combustibles 180.000 k.
Do. cannon and accessories 50.000
Do. armaments, crew, provisions, &c 75.000
General total 1,358.000
Displacement of keel 1,358.426 tons.
ARMAN