Io caussa boni anagramma [= Ionas Iacobus]
Linea recta boni causa est et circulus, istuc
Consule, si nescis, quæso mathematicos.
Anagram on Jon Jakobsen, the source of goodness
The strait line is source of goodness, and so is the circle. If you are ignorant, think of that. I require mathematicians.

Anagram on Venusinus, c. 1577-1604
Peder Hansen's book (p. 162)