One of the earliest mentions of the Maltese islands can be found in a list of donations by Emperor Constatine I in the early fourth century, which includes a grant to the Lateran baptistery of a "massa" with revenues of 222 "solidi" which was apparently located on the island of Gozo. However, the first proper mention of Medieval Malta in the context of the Eastern Roman Empire is found in Procopius' "Bellum Vandalicum" detailing the Byzantine campaign in North Africa. The Byzantine general Belisarius is described "touching at" Malta in 533 , while the Roman expeditionary force was sailing from Kaukana to North Africa. However, the Greek verb used can mean either "landed" or "approached." In the same passage, Procopius describes Malta as dividing the Adriatic and Tyrrhenian seas, indicating that the islands may have lied on a maritime border separating Vandal and Byzantine spheres. The passage does not say that Belisarius conquered the islands, or that the Maltese islands were already in Byzantine hands. In fact, Malta is not included in the "Synecdmus" of Hierocles, which details a list of cities belonging to the Empire in 527/8.