Govan is a small settlement sitting within rural countryside and the River Clyde is in it's natural state with small islands. An old Scottish word for Island is "Inch" hence the word Inch appearing on the map.
A hundred years later and still a small settlement exists at Govan. The houses on the river bank are possibly fishermen. Note also the church in the background which is most likely the site of the current Govan Parish.
By now the River Clyde had been straightened and deepened. The islands are gone.
Larger boats are able to sail down the River Clyde. Govan still resembles a rural settlement.
The shipyards are now forming along the river.