“Dinni fash yersel. Me an Rover here have navigated this river man an cub for over twenty year.”
fash: trouble, vex.
“Do not trouble yourself. Rover and myself have navigated this river man and cub for over twenty years.”
Before roads and wheeled transport you can think of our rivers and coasts as the motorways of the (not so) ancient world.
The Vikings used to navigate from the North of Europe right down to the South by River and Lake and as far as China some claim.
Next time you look at major historic buildings such as grand houses, farms and castles, have a look at how they are situated in relation to the nearest waterway.