The Arno River

Emily, Annette, Ludovico, and Du Pont cross the Arno river by moonlight as they make their escape from Udolpho. (461). It has always been a key transit route between the sea and the Appenines. 

Marseilles

Emily, Du Pont, Annette, Ludovico sail into Marseilles from Italy after escaping Udolpho. 

Marseilles is an old port city, founded by the Greeks in 600 BC. It has been known as an immigration and trade route since then.

The 10 Best Marseille Cruise Port (Terminal Croisières Marseille) Tours &  Tickets 2021 | Viator

Amours de Voyage

Arthur Hugh Clough’s verse-novel, Amours de Voyage was completed shortly after the events of the 1849 Roman Republic, which Clough witnessed as a tourist. Amours de Voyage was first published in The Atlantic Monthly in four parts in 1858: Canto I in Vol. 1.4 (February, 1858); Canto II in Vol. 1.5 (March 1858); Canto III in Vol. 1.6 (April 1858); and Cantos IV and V in Vol. 1.7 (May 1858).