The practice seems to have originated in a connection which was formed between the Mates of West India ships[55] and the criminal Receivers, residing near the river, who were accustomed to assail them under the pretence of purchasing what is called _sweepings_, or in other words, the spillings or drainings of sugars, which remained in the hold and between the decks after the cargo was discharged. These sweepings were claimed as a perquisite by a certain proportion of the Mates, contrary to the repeated and express rules established by the Committee of Merchants, who early saw the evils to which such indulgences would lead, and in vain attempted to prevent it. The connivance, however, of the Revenue officers became necessary to get these sweepings on shore, and the quantity of spillings were gradually increased year after year by fraudulent means, for the purpose of satisfying the rapacity of all whose assistance and collusion was found necessary to obtain the object in view. [Footnote 55: It is not here meant to criminate all the Mates of ships in this trade; for a large proportion are known to be men worthy of the trust reposed in them.] The connection thus formed, and the necessary facilities obtained, from the sale of sweepings, recourse was at length had to the disposal of as much of the cargo as could be obtained by a licence to nightly plunderers, composed of Receivers, Coopers, Watermen, and Aquatic Labourers, who having made a previous agreement with the Mate and Revenue Officers, were permitted, on paying from thirty to fifty guineas, to come on board in the night,--to open as many hogsheads of sugar as were accessible,--and to plunder without controul. For this purpose, a certain number of bags dyed black, and which went under the appellation of _Black Strap_, were provided.--The Receivers, Coopers, Watermen, and Lumpers, went on board at the appointed time, for all these classes were necessary. The hogsheads of sugar and packages of coffee, &c. were opened; the black bags were filled with the utmost expedition and carried to the Receivers, and again returned to be refilled until daylight, or the approach of it, stopped the pillage for a few hours. On the succeeding night the depredations were again renewed; and thus, on many occasions, from fifteen to twenty hogsheads of sugar and a large quantity of coffee, and also in some instances rum (which was removed by means of a small pump called a Jigger, and filled into bladders with nozzels,) were plundered in a single ship, in addition to the excessive depredations which were committed in the same ships by the Lumpers or labourers who were employed during the day in the discharge of the cargo.--Instances have been adduced, and judicially proved, of various specific ships having been plundered in an excessive degree in this manner; and it has been estimated upon credible authority, that previous to the establishment of the Marine