The Book of the Thousand Nights and a Night… (1887)
“ Dr. Grimm is mistaken in saying that in the Arabian tale the "rock Sesam" falls open at the words Semsi and Semeli: even in his own version, as the brother finds to his cost, the word Simeli does not open the rock. In Ali Baba the word is "Simsim" (Fr. Sesame) , a species of grain, which the brother having forgot, he cries out "Barley." ”
