Lydos favored placing one or two horsemen in a panel on the dark, imposing shape of an amphora. This conceit, a refinement of the earlier horse-head amphorae, was adopted by artists associated with him. The graffito on the lip (HI) is not a friendly American greeting. It may possibly be the beginning of a dedication or it may have some commercial significance, the usual function of such inscriptions.
Inscription: Graffito on the lip in Greek: "HI"
Redmond, Roland L. and Dudley T. Easby Jr. 1952. "Report of the Trustees for the Year 1951." The Metropolitan Museum of Art Bulletin, 11(1): p. 27.
Beazley, John D. 1956. Attic Black-figure Vase-painters. p. 119, no. 6, Oxford: Clarendon Press.
Beazley, John D. 1971. Paralipomena: Additions to Attic Black-Figure Vase-Painters and to Attic Red-Figure Vase-Painters [2nd edition]. p. 48, Oxford: Clarendon Press.
Metropolitan Museum of Art. 1980. The Horses of San Marco: The Metropolitan Museum of Art, February 1-June 1, 1980, New York. no. 12, p. 4, New York: The Metropolitan Museum of Art.
Mertens, Joan R. 2010. How to Read Greek Vases. p. 16, fig. 6, New York: The Metropolitan Museum of Art.