Somewhere I came up with a postcard of this piece by Wendy Ellertson, although I haven't been to Boston in ages and I can't recall having seen her work when I was there.
I sent the card to Sovay with the following limerick:
Though traveling a tremendous distance,
Beware of a dragon's assistance.
He may keep his offer
Just as he did proffer --
But he may be seeking subsistence.