Alexander invented a "DISPENSING CABINET FOR OILS OR OTHER FLUENT MATERIALS" which was patented in 1939. His elder brother, (Sir) George Lowe, FRSE CBE DL (1899-1980) was a noted horticulturalist and businessman.
"David Lowe & Sons grew vegetables, fruit and flowers using, for many years, fine old horses to work the fields. Everybody was sad when the day came to replace them with tractors and I never got used to the quietness of the stable yard. But looking back, I feel very lucky to have the memory of the horses and of the fields, once full of Musselburgh's famous leeks, now full of houses." Janet Helen Hunt, "Growing Up in East Lothian - Reminiscences from across the county", part of "The Fourth Statistical Account of East Lothian".