*looks at all the sketches* OMG, you illustrated our favourite Fritz-to-Fredersdorf letter! Can't think of a better birthday present. (Well, you know, except for the part where he'd be mortified if he knew these letters survived, but never mind that.) The family picture is adorable.

Incidentally, given that both Fritz and Heinrich are January kids, I can only conclude that April, not May, did it for FW and SD....