First—Hatches with open gratings, instead of the close hatches which are usual in merchant vessels.

Secondly—Divisions or bulkheads in the hold or on deck more numerous than are necessary for vessels engaged in lawful trade.

Thirdly—Spare plank fitted for being laid down as a second or slave deck.

Fourthly—Shackles, bolts, or handcuffs.

Fifthly—A larger quantity of water in casks or in tanks than is requisite for the consumption of the crew of the vessel as a merchant vessel.

Sixthly—An extraordinary number of water casks or of other vessels for holding liquid, unless the master shall produce a certificate from the custom house at the place from which he cleared outwards, stating that a sufficient security had been given by the owners of such vessel that such extra quantity of casks or of other vessels should only be used for the reception of palm oil, or for other purposes of lawful commerce.

Seventhly—A greater quantity of mess tubs or kids than are requisite for the use of the crew of the vessel as a merchant vessel.

Eighthly—A boiler or other cooking apparatus of an unusual size, and larger or fitted for being or capable of being made larger than requisite for the use of the crew of the vessel as a merchant vessel, or more than one boiler or other-cooking apparatus of the ordinary size.

Ninthly—An extraordinary quantity either of rice or of the flour of Brazil, manioc, or cassada, commonly called farinha, of maize or of Indian corn, or of any other article of food whatever, beyond what might probably be requisite for the use of the crew, such rice, flour, maize, Indian corn, or other article of food not being entered on the manifest as part of the cargo for trade.

Tenthly—A quantity of mats or matting larger than is necessary for the use of the crew of the vessel as a merchant vessel.

Eleventhly—Any other equipment, article, or thing, which is declared by any existing slave trade treaty to be primâ facie evidence of, a vessel being engaged in the slave trade.