This point, as regards the raising of cotton by free labor, Mr. Philbrick did successfully make later, as will be seen (see page 265). Another inducement to Northern capital to come South was offered by him at this time in a letter which appeared in the Boston _Daily Advertiser_ on July 20. It was entitled "A New Market for Manufactures," and tabulated the results of his operations in the "shop" during the fifteen months of its existence so far. Between March, 1862, and March, 1863, for instance, a population of four hundred and twelve had spent there $3047; during the months of May and June, 1863, a population of nine hundred and thirty-three had spent $3800; the articles bought had included a variety of dry goods, provisions, hardware, etc., almost all of which supplied needs entirely new to the blacks. The letter concluded: "It may readily be seen that a considerable demand may arise for the articles above-named and others of kindred nature, when a population of some millions shall be in a position to apply their earnings to the supply of their rapidly increasing wants. Should not the manufacturing interests of the North be awake to this?" This letter, written for the express purpose of bringing means of civilization to the blacks, was taken by many Northern friends of the negro as proof that its writer's motive was to exploit the black race for the benefit of the white. Of course, Mr. Philbrick knew perfectly well to what misconstruction he exposed himself when he told the public that there was profit to be made on the old plantations. The following letter was written in reply to a warning from C. P. W. on this very head. E. S. P. TO C. P. W.