John Mattocks by Charles Fenderich, lithographer Peter S. Duval, 1841, lithograph on paper, from the National Portrait Gallery - NPG-S NPG 66 27Mattocks-000001, Charles Fenderich

John mattocks by charles fenderich, lithographer peter s. Duval, 1841, lithograph on paper, from the national portrait gallery which has explicitly released this digital image under the cc0 license. (https://npg. Si. Edu/object/npg_s_npg. 66. 27). Date: 1841.