Via Google Books (est. 2004), digitalized copies of the two 1830's memoirs on James Brainerd Taylor are available online at no cost. They are fully searchable and downloadable.
John Holt Rice and Benjamin Holt Rice, Memoir of James Brainerd Taylor, Second Stereotype Edition. New York: American Tract Society, 1833. Digitalized February 22, 2008, from Harvard University Library.
--> 441 pages
--> Volume 15 in the American Tract Society's Evangelical Family Library . . . was ATS's fifth most printed memior in the mid-1800s, surpassed only by the memoirs on David Brainerd (1718-1747, a cousin of J. B. Taylor), Henry Martyn (1781-1812), Edward Payson (1783-1827) and Harlan Page (1791-1834)
--> One of 6-8 editions of the Memoir (including one in London) but the American Tract Society's second edition was by far the most popular
--> The Memoir (first edition) was reviewed in the January 1834 issue of The Princeton Review (called then The Biblical Repertory and Princeton Review, Vol. 6, No. 1, Article III by Henry Axtell, pages 51-58) . . . was one of many theological journals that reviewed the popular memoir (can search via Google Books)
Fitch W. Taylor (J. B. Taylor's younger brother). A New Tribute to the Memory of James Brainerd Taylor. New York: John S. Taylor (no relation), 1838. Digitalized February 11, 2010, from Columbia University Library.
--> 440 pages
--> Among other journals, A New Tribute was reviewed in an 1838 issue of the Quarterly Christian Spectator (Vol. 10, No. 2, "Miscellaneous Notices," pages 347-48).
either memoir or the AbeBooks.com database to purchase a copy.