E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Pons Asino’rum.
The fifth proposition, book i., of Euclid—the first difficult theorem, which dunces rarely get over for the first time without stumbling. It is anything but a “bridge;” it is really pedca asinorum, the “dolt’s stumbling-block.”
ca asinorum, the “dolt’s stumbling-block.”
s (4 syl.).
