WHEN, in a letter to his friend George Cumberland, written just a year before his departure to Felpham, Blake lightly mentions that he had passed " nearly twenty years in ups and downs" since his first embarkation upon "the ocean of business," he is simply referring to the anxiety with which he had been continually harassed in regard to the means of life. He gives no hint of the terrible mental conflict with which his life was at that time darkened...