 The letters from the Ambrosian palimpsest, together with the other fragments, were published at Rome in 1815.The Vatican texts were added in 1823, as well as the end of his "Gratiarum actio pro Carthaginiensibus" from another Vatican manuscript.It was not until 1956 that Bernhard Bischoff identified a third manuscript (consisting of a single leaf) that contained fragments of Fronto's correspondence with Verus which overlapped the Milan palimpsest; however, the actual manuscript had been first published in 1750 by Dom Tassin, who conjectured that it might have been the work of Fronto.