Whittier's part in the anti-slavery struggle was not always a quiet one. On one occasion, when in company with a famous but unpopular English reformer he was to address an audience on the subject of abolition, he was attacked by a mob while passing quietly along the street with a friend, and narrowly escaped being tarred and feathered. Somewhat later he was set upon in another town by a crowd armed with sticks and stones and other missiles, from which he fled with more haste than dignity. It was while he was editor of the _Freeman_ that Pennsylvania Hall, where the Philadelphia Abolitionists held their meetings, was burned by a mob, and the papers from Whittier's editorial room in this building were used to help start the blaze. In 1836 the farm at Haverhill had been sold, and a cottage was bought in Amesbury near the Quaker meetinghouse. It was in this quiet place, under the loving care of his mother and sister, that Whittier made his home after resigning his position with the _Freeman_. These two women were in their way as unselfishly devoted to the cause of freedom as was the poet himself, for they encouraged his loyalty and bore privation uncomplainingly. In the darkest hour of their need, when it seemed as if their home must be mortgaged, Whittier was invited to become a contributor to the _Atlantic Monthly_, then being founded, and thus the long period of want was brought to an end. After the death of his mother, in the following year (1858), Whittier's association with his sister Elizabeth became even closer than before, though they had always shared each other's hopes and interests with unusual sympathy and understanding. When she died, in 1864, it seemed to him that part of his life had gone with her. It was with this grief still fresh in his mind that he wrote the best known of his poems, _Snow-Bound, A Winter Idyl_, in which he pictures in the most simple and lifelike manner the quiet loveliness of his childhood home. With especial tenderness he tells of the much-loved sister, and lets his mingled grief and hope of reunion be seen: