“My lords, we are vertebrate animals, we are mammalia! My learned friend's manner would be intolerable in Almighty God to a black beetle.”
"On the Authority of Lord Coleridge" [John Duke Coleridge, first Baron Coleridge (1820–1894)]; reported in Hoyt's New Cyclopedia Of Practical Quotations (1922), p. 493. The same quotation is given on the same authority in the ninth edition of Bartlett's Familiar Quotations (1905), essentially a reprint of the 1891 edition.
P. G. Wodehouse made use of the same quotation in a short story, "The Man Upstairs," which was published nearly simultaneously in March 1910 in the Cosmopolitan magazine for the American market and for the Strand magazine for the English market. Interestingly, while the American short story uses the "Almighty God" version of the quotation, it appears in a slightly variant form in the English publication: " ' "My learned friend’s manner would be intolerable in an emperor to a black-beetle," ' quoted Beverley." It is probably that Wodehouse (or more likely his editors) altered the quotation to avoid the very strict blasphemy laws that formerly obtained in the United Kingdom, changing the quotation to refer merely to a highly ranked human.
Attributed
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William Henry Maule 11
British politician 1788–1858Related quotes

Jimmy Kantor in 'A healthy grave' (1967).
Rivonia Trial

Remark in 1972, as quoted in "Schindler : Why did he do it?" (2010) by Louis Bülow.

“Animals are my friends… and I don't eat my friends.”

Forgiven (affectionately also known as Alexander Beetle).
Now We Are Six (1927)

… I can honestly say I've not been tempted to give up veganism in 27 years. I sometimes smell a chip shop and like the smell but then feel guilty because fish might be part of it. But I'll go home and make vegan chips. After all these years, my favourite food is my mother's butter bean stew with whole potatoes, yam and dasheen. I don't think I've ever made a meal for her, to be honest. I think she would consider it a failing of her motherhood and say "Boy, get out the kitchen."
"Interview: Benjamin Zephaniah" by John Hind, TheGuardian.com (18 July 2010) https://www.theguardian.com/lifeandstyle/2010/jul/18/benjamin-zephaniah-life-on-a-plate