Private effort often secured the liberation of slaves. Friends at home naturally exerted themselves, and many families were straitened by generous contributions for this purpose. The widowed mother of Cervantes sacrificed the entire pittance that remained to her, including the dowry of her daughters, to aid the emancipation of her son. An Englishman, of whose doleful captivity there is a record in the memoirs of his son, obtained his redemption through the earnest efforts of his wife at home. "She resolved," says the story, "to use all the means that lay in her power for his freedom, though she left nothing for herself and children to subsist upon. She was forced to put to sale, as she did, some plate, gold rings, and bracelets, and some part of her household goods, to make up his ransom, which came to about one hundred and fifty pounds sterling."[65] In 1642 four French brothers were ransomed at the price of six thousand dollars. At this same period the sum exacted for the poorest Spaniard was "a thousand shillings," while the Genoese, "if under twenty-two years of age, were freed for a hundred pounds sterling."[66] These charitable efforts were aided by the co-operation of benevolent persons. George Fox interceded for several Quakers, slaves in Algiers, writing "a book to the Grand Sultan and the king at Algiers, wherein he laid before them their indecent behavior and unreasonable dealings, showing them from their Alcoran that this displeased God, and that Mahomet had given them other directions." Here was the customary plainness of the Quaker. Some time elapsed before an opportunity was found to redeem them; "but in the mean while they so faithfully served their masters, that they were suffered to go loose through the town, without being chained or fettered."[67] [65] Memoirs of Abraham Brown, MS. [66] Relation of Seven Years Slavery: Osborne's Voyages, Vol. II. p. 489. [67] Sewel's History of the Quakers, p. 397.