James Otis's arguments on the Writs of Assistance and John Adams's letters to William Tudor, by dwelling on the injurious features of these acts, and passing over all compensating considerations, give an erroneous notion of them. The idea that they originated in a hostile disposition of the British people or merchants towards the colonists is not entitled to a moment's consideration. They formed a commercial policy, not a political policy. The more numerous, wealthy, and prosperous the colonists became, the more useful they were to the British merchants, so long as they could monopolize the trade. That was their object; and where the freedom of colonial trade would not interfere with British trade, it was left free. For example, the most profitable trade of New England was with the French and Spanish West India Islands and the Spanish Main. The short distance favored small vessels and small capitals. The exchange of lumber, grain, cattle, and fish for sugar and molasses, with an occasional voyage to the coast of Africa for slaves, during that traffic,[20] yielded rich returns. This trade was free; and so was that of Asia and Africa, and some ports of Europe, except for certain enumerated articles. It was not only permitted, but with respect to some commodities was encouraged by bounties. Between 1714 and 1774, the colonists, chiefly those of New England, received £1,609,345 sterling on their commodities exported to Great Britain;[21] and through a system of drawbacks, by which the duties on goods imported into England were repaid on their exportation to America, the colonists often bought Continental goods cheaper than could the subjects within the realm. These favors no more indicated good will than the restrictions indicated hostility. Both rested on purely commercial considerations. There were other compensations. The naval supremacy of Great Britain, due chiefly to the navigation laws, protected colonial commerce in whatever seas it was pushed; and the stimulus of monopoly withdrew British capital from other less lucrative enterprises, and directed it to the colonies, where it was freely used by planters in developing lands which otherwise would have been uncultivated for lack of capital.[22] And although certain colonial produce was obliged to find its only European market in England, it had the monopoly of that market.