[C] “Ounce” was a mediæval measurement of running water, of which there were once as many varieties in Italy as there were provinces. Some of these are still in use. The Roman _oncia d’acqua_, or ounce of water, was practically equivalent to four times the quantity of water known as the California “miner’s inch.” This “miner’s inch” amounts to something like sixteen thousand gallons in twenty-four hours, and therefore the grant of two Roman “ounces” gave the Colonna the right to draw from the Fountain of Trevi eight times that amount, or one hundred and twenty-eight thousand gallons every twenty-four hours. [D] One of Vignola’s early plans for the Villa Giulia has lately come to light. It shows the main structure much as it is, but with a large wing to left and right, and a long garden running down either side of the central court behind each wing. There are also other differentiations, and it is evident the plan must have entailed a larger and more expensive building than that which was finally erected. The plan measures four by five feet and is beautifully prepared. It is now in the possession of Mr. Lawrence Grant White, of New York. [E] This cardinal became Pope Marcellus, for whom Palestrina is said to have written the Mass of Pope Marcellus. [F] A curious story related by Wraxall (“Memoirs,” vol. I, p. 183) shows that the Villa Giulia in its eighteenth century period of isolation and decay proved a convenient shelter for secret crimes committed by persons of exalted rank. [G] The ornamental detail of the “Sixtine lion” looks as if this fountain, like the Tartarughe, had been finished in the pontificate following Gregory XIII’s--that is, in the pontificate of Sixtus V.