In the last issue of this journal, Ben Harris authored a research note on Margaret Floy Washburn and her cats (see record 2023-67784-001). What was not included with that piece was an image Washburn's bookplate, which shows an image of a cat (quite possibly a likeness of her most acclaimed cat, "Hiram") with an accompanying Biblical verse in Greek, taken from 1 Thessalonians 5:21, which translated reads as "Test all things; hold fast what is good (NKJV)." It is reproduced in this article. (PsycInfo Database Record (c) 2023 APA, all rights reserved).