" Then he demanded to see the royal storerooms and the lettuce garden. When he came back he looked very grave and said, “Great King, I know very well what sorry news it will be to you, but the cause of your sickness is those very lettuces by which you set such store.”
“The lettuces?” cried King Darin. “Impossible! They are all grown from good, healthy seed and guarded day and night.”
“Alas!” said El-arairah, “I know it well! But they have been infected by the dreaded Lousepedoodle, that flies in ever decreasing circles through the Gunpat of the Cludge—a deadly virus—dear me, yes!—isolated by the purple Avvago and maturing in the gray-green forests of the Okey Pokey. This, you understand, is to put the matter for you in simple terms, insofar as I can. Medically speaking there are certain complexities with which I will not weary you. "

― Richard Adams , Watership Down (Watership Down, #1)