Course of the canal to the Gulf of Nicomedia proposed by <a href="https://en.wikipedia.org/wiki/Pliny_the_Younger" class="extiw" title="en:Pliny the Younger">Pliny the Younger</a>. Reconstruction attempt by v. Hammer in 1818.
v. Hammer
1818
Siegfried Froriep: <i>Ein Wasserweg in Bithynien. Bemühungen der Römer, Byzantiner und Osmanen</i>, in: <i>Antike Welt</i>, 2nd special issue (1986), p.43, fig.8