Grotefend continued to write upon these subjects down to his death in 1853. He endeavoured to keep abreast of the new discoveries in Assyria. He was familiar with the writings of Botta and Layard. He studied the disquisitions of Westergaard, Hincks, and Rawlinson. He contributed articles on the builder of the Khorsabad Palace; on the age of the Nimrud Obelisk; on the foundation and destruction of the buildings of Nimrud; and on inscriptions found at Babylon and Nimrud. When M. Mohl, the well-known secretary to the French Asiatic Society, visited him shortly before his death, he found his table littered with inscriptions, chiefly those received from Bellino in the early years of the century.[346] He professed to have given up his Persepolitan studies in favour of the new Assyrian inscriptions; and he saw no reason why he should not succeed in unravelling their mystery. It is somewhat pathetic to observe the old man of seventy-eight, still animated by the recollection of a success he had achieved fifty years before, but had never been able to repeat, vainly hoping that at the last moment he might be rewarded by another fortunate guess that would redeem the long failure of so many years. The new discoveries were coming upon him with extraordinary rapidity and magnitude, and he could not but feel crushed and helpless beneath such an accumulation of fresh materials. The solution of the difficulties they involved had passed into younger and abler hands than his, and he had to comfort himself as best he might with the recognition so freely accorded to him, that he had laid the foundation upon which others were now building; and with the assurance that the recollection of his services would not wholly pass away from the remembrance of men.[347]