That’s an interesting comparison, Quicktrader, and a good example of how different Z’s handwriting can be from one confirmed letter to another. I’m sure there are recognizable traits but I think that’s a complication for amateurs trying to compare handwriting. I would never guess, for instance, that the same writer wrote "Editor" on the Stine letter and Dragon card. None of them look completely out of place to me but it’s hard to judge from one word.