Excavator of various important Surrey sites.
Lowther was schooled at Charterhouse in Surrey and later qualified and became an architect in London. He maintained wide interests, which included archaeology, and joined the Surrey Archaeological Society in 1927. At the Society he served in many positions, becoming Vice-President in 1958. He was also a local correspondent for the Ordnance Survey and served on the Ancient Building Committee of Surrey County Council.
He is perhaps best known for his numerous excavations, which cover sites for all periods, some of which are of national importance. He made notable contributions to Iron Age and Roman studies in Surrey, including sites at Ashtead, Carshalton, Ewell, Farnham and Walton-on-the-Hill.