We haven't been able to find any information on William Merriam Pratt, but from the looks of this plate, he must have been a very interesting man! The compass and square suggest that he may have been an architect or builder or engineer (or perhaps a Mason). Or is it, like the skull and the flirty woman and the spider and the book and the hourglass, symbolic -- but of what? The significance of the artwork and its meaning to Mr. Pratt's life is anyone's guess.