1 This important inscription is a decree of the praefectus urbi, Claudius Iulius Ecclesius Dynamius, ' de fraudibus molendinariorum '; the mills are enumerated in conjunction with the baths of Ampelis, Priscus, and Diana, and the Janiculum in Reg. Our illustration does not show the steps of masonry descending to the floating mills on the Tiber (for which see Cod. Esc. 27'', 561), which are probably the ' gradellae ' from which S. Gregorio and S. Maria de Gradellis took their name (HCh 258, 336, 590, 597; BC 1925, 57-69 (see MATER MATUTA, TEMPLUM).