Page 84 of Ruth Delany’s The Shannon Navigation (Lilliput Press 2008) has a drawing with this caption:
A drawing by Edward Jones which it is thought might depict the Shannon Commission’s survey in progress at an unidentified location possibly down the Shannon Estuary. (Courtesy of the Society of Antiquaries of London)
I suggest that the drawing is of Saleen, on the Ballylongford Creek in Co Kerry, on the lower reaches of the Shannon Estuary. The first word written on the drawing looks like “Sawline”, which might be a version of “Saleen”.