It is greatly to be regretted that Galen has given us no description of the dreadful plague which prevailed in his time. It appears that he fled from Rome for fear of infection. He alludes to it, indeed, in several parts of his works, but in very brief terms, only mentioning that it put on the appearance of dysentery; and in one place he strongly commends the celebrated theriac as a most efficacious remedy for the prevention and cure of pestilential disorders; and elsewhere he speaks favorably of the Armenian bole. Of the writers on medicine posterior to him, Oribasius and Aëtius, like our author, give no further information on this important subject than what is contained in the brief extract from the works of Ruffus; and the others, with the exception of Nonnus and Psellus, do not treat of the disease at all, unless in an incidental manner. Nonnus, after briefly stating the causes of the plague, proceeds to lay down the principles for conducting the treatment. He recommends clysters, and, if the stomach be loaded with phlegm, emetics: if there be a fulness of blood, he approves of venesection; and also speaks well of giving diuretics. When symptoms of ardent fever are present, he directs cold drink to be given freely, in order to extinguish the febrile heat. He also recommends apomel, the water of ptisan with the seed of bastard saffron, or Armenian bole, or lapis lazuli. Psellus merely mentions, in very general terms, a few of the common symptoms of the plague. (Opus Medicum.) Actuarius, treating of anthrax, mentions that it sometimes take place in epidemical affections. (Meth. Med. ii, 36.)