'stream whereof maketh glad the city of our God,' afterward reduce this man to slavery, it is next to an impossibility to retain him in slavery."[538] [538] Mitchell, _The Underground Railroad_, p. 20 _et seq._ Harriet Tubman, like John Mason, did not reckon the value of her own liberty in comparison with the liberty of others who had not tasted its sweets. Like him, she saw in the oppression of her race the sufferings of the enslaved Israelites, and was not slow to demand that the Pharaoh of the South should let her people go. She was known to many of the anti-slavery leaders of her generation; her personality and her power were such that none of them ever forgot the high virtues of this simple black woman. Governor William H. Seward, of New York, wrote of her: "I have known Harriet long, and a nobler, higher spirit or a truer, seldom dwells in human form."[539] Gerrit Smith declared: "I am convinced that she is not only truthful, but that she has a rare discernment, and a deep and sublime philanthropy."[540] John Brown introduced her to Wendell Phillips in Boston, saying, "I bring you one of the best and bravest persons on this continent--General Tubman as we call her."[541] Frederick Douglass testified: "Excepting John Brown, of sacred memory, I know of no one who has willingly encountered more perils and hardships to serve our enslaved people than you have. Much that you have done would seem improbable to those who do not know you as I know you...."[542] Mr. F. B. Sanborn said: "She has often been in Concord, where she resided at the houses of Emerson, Alcott, the Whitneys, the Brooks family, Mrs. Horace Mann, and other well-known persons. They all admired and respected her, and nobody doubted the reality of her adventures...."[543] The Rev. S. J. May knew Harriet personally, and speaks with admiration, not only of the work she did in emancipating numbers of her own people, but also of the important services she rendered the nation during the Civil War both as a nurse and as "the leader of soldiers in scouting-parties and raids. She seemed to know no fear and scarcely ever fatigue. They called her their Moses."[544] [539] Sarah H. Bradford, _Harriet the Moses of Her People_, p. 76. See also Appendix, p. 137. These testimonials were given in 1868 and were printed in connection with a short biography of Harriet in the year mentioned. The first edition of this biography has not been accessible to me, but it is mentioned by the Rev. Samuel J. May in his _Recollections of the Anti-Slavery Conflict_, published the following year. The second edition of the book appeared in 1886. [540] _Ibid._, p. 139. [541] Hinton, _John Brown and His Men_, p. 173. [542] Mrs. Bradford, _Harriet the Moses of Her People_, p. 135. [543] _Ibid._, pp. 136, 137. [544] _Ibid._, p. 406.