Hats off to Jeff Grant! In "9x9 Word Squares" in the November, 1980 issue of Word Ways, he has rescued the nine-square from near-oblivion and done so within the confines of dictionaries. His article rekindled the spark of an old interest of mine -- the ten-square. For some time, I have felt (as Jeff Grant does) that constructing a ten-square is not beyond the realm of possibility.
Ropes, G. Hardy
"The Elusive Ten-Square,"
Word Ways: Vol. 14
, Article 4.
Available at: https://digitalcommons.butler.edu/wordways/vol14/iss1/4