Board Thread:General Discussion/@comment-4821842-20150601033915/@comment-24674051-20150605134435

Not necessarily. Walt spent his time in the LWM. (as probably did some of the other Authors.  I suspect Shakespeare was an earlier author as well, and HCAnderson and the Brothers Grimm). With no magic to speak of, they would probably age normally.

Isaac, it seems spent more of his time in the EF, and in some of the tangential lands (like 1920's London), where magic was available. So he would not age, or could adjust his appearance with a flick of the quill.