Consider the picture below, depicting a cross allegedly found by monks of Galstonbury Abbey in a tomb (allegedly) containing the remains of King Arthur.
It's suppose to say:
Hic jacet sepultus inclitus rex Arturius in insula Avalonia
(source of quote and image here)
I find odd that the N is depicted like an H. Notice there is also another H (Hic), but they might not be the same (the latter has a thinner middle stroke). Is this representation of N common to a region/period? Or is it rare? I've never seen it before. There is no mention of it in Wikipedia, for instance. Searching this index of Latin inscriptions seems to show no such use for H either. N seems to be always used for N.