Sir John Tenniel (28 February 1820 – 25 February 1914) was an English illustrator, graphic humorist, and political cartoonist prominent in the second half of the 19th century. He was knighted for his artistic achievements in 1893.

Tenniel is remembered especially as the principal political cartoonist for Punch magazine for over 50 years, and for his illustrations to Lewis Carroll's 'Alice's Adventures in Wonderland' (1865) and 'Through the Looking-Glass', and 'What Alice Found There' (1871).

Lewis Carroll originally illustrated Wonderland himself, but his artistic abilities were limited. Engraver Orlando Jewitt, who had worked for Carroll in 1859 and had reviewed Carroll's drawings for Wonderland, suggested that he employ a professional illustrator. Carroll was a regular reader of Punch and was therefore familiar with Tenniel. In 1865 Tenniel, after long talks with Carroll, illustrated the first edition of 'Alice's Adventures in Wonderland'.

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