In 1887, John Bartholomew's Gazetteer of the British Isles described Langport like this:
Langport.-- market town and par. (Langport Eastover) with ry. sta., Somerset, on river Parret, 12 miles NW. of Yeovil, 171 ac., pop. 897; P.O., T.O., 1 Bank, 1 newspaper. Market-day, Tuesday. A charter was granted to this town by James I. It supports a considerable trade chiefly by boat traffic with Bridgwater, the articles of commerce being coal, timber, iron, salt, and bricks.
GB Historical GIS / University of Portsmouth, History of Langport in South Somerset | Map and description, A Vision of Britain through Time.
Date accessed: 26th April 2017
Click here for more detailed advice on finding places within A Vision of Britain through Time , and maybe some references to other places called " Langport ".