- Author: L. G. Illingworth Author Record # 235654
- Legal Name: Illingworth, Leslie Gilbert
- Birthplace: Barry, Glamorgan, Wales, UK
- Birthdate: 2 September 1902
- Deathdate: 20 December 1979
- Language: English
- Webpages: lambiek.net, Library of Congress, library.wales, Wikipedia-EN
- Used These Alternate Names: Illingworth
- Note: Welsh political cartoonist and magazine illustrator, for a time chief cartoonist at Punch
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Cover Art Interior Art
- The Elixir of Life (1926)
- The Elixir of Life [2] (1926)
- The Elixir of Life [3] (1926)
- Bottled Spirit (1927)
- Bottled Spirit [2] (1927)
- Bottled Spirit [3] (1927)
- The Prince's Birthday Present (1927)
- The Prince's Birthday Present [2] (1927)
- The Prince's Birthday Present [3] (1927)
- The Prince's Birthday Present [4] (1927)
- The Prince's Birthday Present [5] (1927)
- Koko the Thingumabob (1928)
- Koko the Thingumabob [2] (1928)
- Koko the Thingumabob [3] (1928)
- Crispin the Turnspit (1930) [only as by Illingworth]
- The Prince Who Hiccupped and Other Tales (1932)
- The Necessity of Invention (1932) [only as by Illingworth]
- How Ryan Got Out of Russia (1934) [only as by Illingworth]