After the lapse of many years, it was determined to appeal to the new art of photography, in order to obtain a degree of accuracy that could not be achieved by the pencil. The first to make the attempt was a Mr. Ellis, but his negatives were entirely destroyed in the course of the rough journey to the sea. At length Herr Stolze made another and very successful effort.[197] He was attached to a German scientific expedition, sent out to the East in 1874, under the direction of Dr. Andreas, to observe the transit of Venus. Stolze spent some time travelling over Persia, and visited among other places Persepolis and Fasa in the winter of 1874; but his real work began in June 1878, a season of the year when the heat is excessive, and when the process of developing the negatives within a closed box involved actual suffering. Notwithstanding these disadvantages he took upwards of three hundred plates between the date of his arrival on June 16 and his departure on July 3. He found the vertical sun of summer better suited for photographing the inscriptions than the bas-reliefs, especially those situated in the deep shade of the doorways. One of his greatest achievements was the photogrammetric plan of Persepolis, which surpasses any previous attempt to arrive at an accurate survey. It is said that no fewer than three hundred and fifty plates were used in the construction of the three metrical plans at the end of his second volume.[198] After a few days spent at Murgab, he hastened back to cooler quarters. His negatives were so carefully packed that they all reached Europe in safety. Unfortunately, one case was opened at the London Custom House, and the plates were replaced so loosely by the bungling official that a few were cracked; but even these have been pieced together without retaining much trace of their ill usage. In the course of his travels he took no fewer than fourteen hundred negatives, and in the spring of 1879 he had the satisfaction to find himself at Berlin with his treasures. In September 1881, he submitted a few of the completed photographs to the Fifth Oriental Congress, and they sanctioned the publication of those relating to the Achaemenian and Sassanian periods. The result was the appearance, in 1882, of ‘Die Achaemenidischen Denkmäler von Persepolis,’ photographed by Stolze and edited by Noeldeke; and two more ponderous and magnificent folios were thus added to the growing mass of inaccessible lore. Persepolis alone occupies ninety-nine plates, and the scale on which the work is executed may be judged from the devotion of twenty-one views to the Palace of Darius, eighteen to the Palace of Xerxes, twelve to the Hall of the Hundred Columns, and twelve to the Hall of Xerxes. Nine plates (106-14) are devoted to Naksh-i-Rustam and eleven (127-37) to Murgab. It is doubtful how far the photographic process will assist the student of the inscriptions. Noeldeke fears it will be of little