They are induced to take this step from a conviction of its important utility to the literary interests of this country, derived from their long experience in business; and they flatter themselves that this arrangement will place them in the most favourable position for making purchases in the British and Continental Book Markets; while by restricting their business simply to an Agency for the purchase of Books, they will enjoy all the advantages accorded by the custom of the London Trade when books are bought for exportation to a foreign country, but which are rigorously withheld from any establishment engaged in the sale of books on the spot. It will be their aim to merit the patronage of the public by furnishing books at the lowest possible price, and the constant attention of a member of their Firm, personally acquainted with the British and Foreign Book Trade, will secure the speedy execution of all orders entrusted to their care. TERMS.—Colleges, Theological Seminaries, and Incorporated Institutions generally, may have their orders executed, to any amount, free of duty, on a charge of Ten per cent. Commission—the Goods to be paid for on their arrival at New-York—without any advance of cash required. From Gentlemen, and Private Individuals, (when they are not known to D. A. & Co.) an advance of one half the probable cost of the order will be required; the balance to be settled on the arrival of the Books at New-York. A Commission of Ten per cent. being charged.