Painter and engraver (1837–1906) whose studies of Abraham Lincoln and George Washington are considered iconic portraits. ALS signed “Wm. E. Marshall,” two pages, lightly-lined on two adjoining sheets, 5 x 8, Newark, New Jersey, August 27, 1866. Letter to artist Daniel Huntington. In part: “Dr. Dourlen will send you a proof of my Lincoln…I hope this may meet with your approbation as I have striven hard to make a work of art, and a truthful likeness of Abraham Lincoln. With regard to its accuracy as a likeness, I have the commendation of our eminent public men, as well as the most intimate friends of the lamented patriot. All assure me that it could not be better.” In very good condition, with mild toning, and repaired paper loss and two rusty tack holes to the upper border. RRAuction COA.