The Tale of the Flopsy Bunnies:

FOR ALL LITTLE FRIENDS OF MR. MCGREGOR & PETER & BENJAMIN It is said that the effect of eating too much lettuce is "soporific." I have never felt sleepy after eating lettuces; but then I am not a rabbit. They certainly had a very soporific effect upon the Flopsy Bunnies! When Benjamin Bunny grew up, he married his Cousin Flopsy. They had a large family, and they were very improv-ident and cheerful. I do not remember the separate names of their children; they were generally called the "Flopsy Bunnies."