Sheet D of the first edition shows the One Eye River rising a little north of Oxford Cave and a little south of Auchtembeddie.

From here it flows south to a point a little north of Oxford railway halt where it is joined by Rotten Gut River, its only tributary.

From here it swings north west to Wallingford where it disappears into a sink at the eastern foot of a 250 feet (76 m) high north-south ridge.

It reappears on the western side of the ridge, still called One Eye River, where it continues on a generally westward course, now very sinuously through the fields of a sugar estate, eventually joining the Black River a little to the east of Windsor.

[2] The remainder of the description in this book matches what is depicted on the Directorate of Overseas Surveys map.