portion being used by the Mexican.”—Fretl Douglass told a Wishln^ton audience about his personal connectu n with the John Brown raid, the other day. Ilesaid that the constitution for the proposed republic was written at his house in Rochester, and was atill in his possession. He spent a whole day and night with Brown and Shields Green in a quarry near Chambersburg, Pa., just before the descent on Harper’s Ferry, and tried to dissuade them from the execution of their plan. Twelve years before tiie raid, Brown laid before Douglass the plan of a general insurrection all along the Alleghany ridges of the slave states with the idea of mounting hundreds of black men on their masters’ horses, and letting them ride to free soil.