Ist the horseoleum built by a norse that you are referring to? Its at Horseley Hill, south along the A7 from Galashiels. Kormak Dollusen kidnapped his love Fjorleif and after a hard chase they escaped but their horse, Jarngen, dropped dead at Horseley Hill. Kormak and Fjorlief built a mausoleum to the horse, which still exists. The inscription clearly states that it was built by a norse.