From this place a man may travel fifteen miles by a causeway under the mountains, constructed by king Romulus, the founder of Rome, who feared David, king of Israel, and Joab, his general, and constructed buildings both upon and under the mountains. The city of Naples is very strongly fortified; it is situated on the coast, and was originally built by the Greeks. The principal of the five hundred Jews who live here are R. Chiskiah, R. Shalom, R. Eliah Cohen, and R. Isaac, from Mount Hor. One day's journey brings you to Salerno, the chief medical university of Christendom. The number of Jews living here amounts to about six hundred, among whom R. Juda, son of R. Isaac, R. Melchisedek, the grand rabbi, originally from Siponte, R. Solomon Cohen, R. Elija Hajevani (i.e. the Greek), R. Abraham Narboni, and R. Thamon, deserve particular notice as wise and learned men. The city is surrounded by a wall towards the land; one part of it however stands on the shore of the sea. The fort on the summit of the hill is very strong. Half a day to Amalfi, among the inhabitants of which city are twenty Jews, the chief being R. Chananel, the physician, R. Elisha, and the benevolent (or noble) Abu-al-Gid. The Christian population of this country is chiefly occupied with trade; they do not till the ground, but buy every thing for money, because they reside on high mountains and upon rocky hills; fruit, however, abounds; the land being covered with vineyards, olive-groves, gardens, and orchards. Nobody ventures to make war upon them.