In [a comment on a _Man at Arms: Reforged_ video](https://youtu.be/BQxjpm7VQko?google_comment_id=z12pirjrspuncn4ec22wuhqpzue5j53g404) I’ve learned that

> [Roger Zelazny] did draw [Corwin’s sword Greyswandir] for a fan that lives here in Maryland.
> He drew it as a saber with a ships sail guard with the pattern overlayed on it.
> not highly detailed but I was shown the drawing and letter in the mid 1990's.  I wish I had a copy of it!

Are there any such pictures online of what Zelazny intended the Pattern to look like? Either a drawing by Zelazny himself (as in the letter described above) or fan-art plausibly claiming to follow such a drawing by the series’s author.