The invention of the pet flaps door was attributed to Isaac Newton (1642–1727) in a story (authored anonymously and published in a column of anecdotes in 1893) to the effect that Newton foolishly made a large hole for his adult cat and a small one for her kittens, not realizing the kittens would follow the mother through the large one.[6] Two Newton biographers cite passages saying that Newton kept "neither cat nor dog in his chamber".[7][8] Yet over 60 years earlier, a member of Newton's alma mater Trinity college, one J. M. F. Wright, reported this same story (from an unknown source) in his 1827 memoir, adding: "Whether this account be true or false, indisputably true is it that there are in the door to this day two plugged holes of the proper dimensions for the respective egresses of cat and kitten."[9]
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