Very scarce with no other copies on the market; an excellent biography of Ko Thah-Byu, first convert and later important "native" preacher to the nation of Myanmar / Burmah. 

Mason, Frances. The Karen Apostle; Or, Memoir of Ko Thah-Byu, the First Karen Convert; with and Historical and Geographical Account of the Nation, Its Traditions, Precepts, Rites, &c., by Rev. Francis Mason, Missionary to the Karens. Revised by H. J. Ripley, Professor in Newton Theological Seminary. Fifth Thousand. Boston. Gould and Lincoln. 1861. 108pp.

A vert good copy, bound in cloth, generally solid, with light foxing.