Well, Ava, I will only name one, and one for which he is not responsible; but yet it would be insuperable, as far as I am concerned.
"The Maid of Maiden Lane"
Amelia E. Barr
Mr. Doyce had made an invention, but had met with almost insuperable difficulties in getting it before the people.
"Dickens As an Educator"
James L. (James Laughlin) Hughes
There is a difficulty connected with Holy Scripture chronology which would be insuperable were it not that we have the advantage of spiritual aids in elucidation of the text.
"Theological Essays"
Charles Bradlaugh