Mathematician J.E. Littlewood once wrote a paper for the French journal Comptes Rendus. A Prof. M. Riesz did the translation, and at the end Littlewood found three footnotes:
I am greatly indebted to Prof. Riesz for translating the present paper.
I am indebted to Prof. Riesz for translating the preceding footnote.
I am indebted to Prof. Riesz for translating the preceding footnote.
Littlewood notes that this could have gone on indefinitely but “I stop legitimately at number 3: however little French I know I am capable of copying a French sentence.”