The U 240 runestone is known locally as the
Lingsbergsstenen 1 and was raised at the end of a
causeway facing U 241. The causeway is only seen as traces in a field, and U 240 is the only runestone present. The area was much more marshy in the past and difficult to traverse until the water level in a local lake, Angarn, in
Angarnsjöängen Nature Reserve was lowered in the 19th century. The inscription consists of runic text on two serpents or
lindworms that bracket a
Christian cross and some beasts. The final portion of the text that translates as "and Holmfríðr in memory of her husbandman" is carved on the outside of the serpent to the right. U 240 is classified as being carved in
runestone style Pr3, which is also known as
Urnes style, and is considered to be a good example of an inscription in style Pr3. This runestone style is characterized by slim and stylized animals that are interwoven into tight patterns. The animal heads are typically seen in profile with slender almond-shaped eyes and upwardly curled appendages on the noses and the necks. The runic text on U 240 was intended to be read together with that on U 241 to form a unified message. Based on stylistic analysis, the inscription has been attributed to the
runemaster Åsmund, who was active in the first part of the 11th century. ==U 241==