This is a very rare edition of Mommsen's history as an October 25, 2012 WorldCat search could find only 22 libraries worldwide have a copy of this 1872 edition of this work.
"One of the highpoints of Mark Twain's European tour of 1892 was a large formal banquet at the University of Berlin given in honor of two of the nineteenth century's scientific giants, Rudolph Virchow, one of the founders of modern biology, and Hermann von Helmholtz, perhaps Europe's greatest scientific mind since Newton. Mark Twain was an honored guest, seated at the head table with some twenty 'particularly eminent professors'; and it was from this vantage point that he witnessed the following incident:
[in Twain's words] 'When apparently the last eminent guest had long ago taken his place, again those three bugle blasts rang out and once more the swords leaped from their scabbards. Who might this late comer be? Nobody was interested to inquire. Still, indolent eyes were turned toward the distant entrance; we saw the silken gleam and the lifted swords of a guard of honor plowing through the remote crowds. Then we saw the end of the house rising to its feet; saw it rise abreast the advancing guard all along, like a wave. This supreme honor had been offered to no one before, then there was an excited whisper at our table--MOMMSEN!!--and the whole house rose. Rose and shouted and stamped and clapped, and banged the beer mugs. Just simply a storm! Then the little man with his long hair and Emersonian face edged his way past us and took his seat. I could have touched him with my hand--Mommsen!--think of it!..I would have walked a great many miles to get a sight of him, and here he was, without trouble or tramp or cost of any kind. Here he was clothed in a Titanic deceptive modesty which made him look like other men. Here he was, carrying the Roman world and all the Caesars in his hospitable skull, and doing it as easily as that other luminous vault, the skull of the universe, carries the Milky Way and the constellations'." Dero A. Saunders and John H. Collins, editors, of "The History of Rome," by Theodor Mommsen, Meridian Books, 1958, p. 1.
We note that the edition quoted above is an edited version in one volume and it contains only 600 pages while the 4 volume edition contains in volume 1, 635 pp., in volume 2, 568 pp., in volume 3, 571 pp., and volume 4 contains 768 pp.