During the closing credits, when read in order, the red letters spell out "bloater paste," which is the sandwich spread Mrs. Thursday put on her husband's sandwich. Luckily he didn't eat it, because it was probably tainted. According to cooksinfo.com, "Bloater Paste is a fish spread made from salted, smoked herrings called "bloaters", which are smoked whole with the insides still in them. A bloater has a more gamey flavour than cleaned herrings. It is sold in small jars."