On the left the Isle of Seil which is one of the Slate Islands* and across the fast flowing narrows is the mainland at Clachan.
The short pier and slipway in the image foreground was I assume for the ferry which ran before a bridge was built in the late 18th century, This is now known as the Bridge over the Atlantic.

*The Slate Islands are an island group in the Inner Hebrides, lying immediately off the west coast of Scotland, north of Jura and southwest of Oban. The main islands are Seil, Easdale, Luing, Shuna, Torsa and Belnahua. Slates quarried here were exported all over the world,

HWW to one and all.