Boxer known as the 'Boston Strong Boy' (1858-1918) recognized as the last heavyweight champion of bare-knuckle boxing under the London Prize Ring Rules. Bold ink signature, "Compliments of John L. Sullivan, Dec. 21st 1899,” on an off-white 5.5 x 3.5 sheet. Affixed to a same-size sheet and in very good to fine condition, with a central vertical fold, and overall wrinkling from mounting.
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