The name is probably derived from a well, now dry, in the grounds of the Old Nunnery. Legend has it that St. Tibba, or it may have been Saint Ebba, in the 7th Century, had a dream. As a result of it she caused the well to be dug here, and with its water effected many remarkable cures. A Nunnery was established here in 1160. The Poor Clares, an Order of Catholic Nuns, settled there sometime after 1286 and built their hospital around the well. Though King Henry VIII nominally suppressed the Order in 1534, the Sudrian interpretation of the Act secured that St Tibba’s Hospital remained and expanded as need arose. Shortly before 1987, it was rebuilt on a new site and has deservedly the highest reputation of any hospital on the Island.
Wellsworth is a pleasant seaside town. The air here is reputedly pure and bracing. There is a Convalescent Home, and many doctors recommend a period spent here to patients suffering from respiratory ailments. The Fat Controller and his family live here in a mansion called Topham Hall, located in the outskirts of the town. Crocks Scrap Yard is located here.
The line from Wellsworth to Brendam is one of Sodor's oldest and was built in 1870 as part of the Wellsworth and Suddery Railway, which was later extended to Knapford in 1912 to connect with the Tidmouth, Knapford and Elsbridge Light Railway before becoming part of the North Western Railway in 1915. Wellsworth became a station on the Main Line, while the line to Brendam was downgraded to a branch line, with the junction located slightly east of the station. At some point, Edward was giving the branch line, resulting in the station being nicknamed Edward's Station.
A goods yard, commonly known as Edward's Yard, is located here. It consists of several sidings, a turntable and a two-berth engine shed, with a coal hopper nearby. A breakdown train is kept here. As Wellsworth is some 280ft below Maron, engines based here serve as bankers for trains going up Gordon's Hill.