following statistics, in his “Letters on Slavery,”
"Compared with English orators," Dr. Magoon says, "our great countryman was not unlike Sheridan in natural endowment.
"Like him, he was unequaled in impassioned appeals to the general heart of mankind.
"He swayed all by his electric fire; charmed the timid, and inspired the weak; subdued the haughty, and enthralled the prejudiced.
"He traversed the field of argument and invective as a Scythian warrior scours the plain, shooting most deadly arrows when at the greatest speed.
"He rushed into forensic battle, fearless of all consequences; and as the ancient war-chariot would sometimes set its axle on fire by the rapidity of its own movement, so would the ardent soul of Otis become ignited and fulminate with thought, as he swept irresistibly to the goal.
"When aroused by some great crisis, his eloquent words were like bolts of granite heated in a volcano, and shot forth with unerring aim, crashing where they fell."
In respect to physical ability, Otis was happily endowed. One who knew him well has recorded, that "he was finely formed, and had an intelligent countenance: his eye, voice, and manner were very impressive.
"The elevation of his mind, and the known integrity of his purposes, enabled him to speak with decision and dignity, and commanded the respect as well as the admiration of his audience.