Lived at Leatherhead in Surrey. He was chiefly interested in Coleoptera but also collected Lepidoptera and Hemiptera. Joined the in 1895 and bequeathed his collections to that Society along with the Natural History section of his extensive library. His annotated copy of Curtis’s, British Beetles, 1863, however, is in the RES Library. At the time of his death he was a member of the Council of the Society and Recorder of Attendances at meetings. Ashdown occupied most of his time collecting in the Leatherhead area but spent his holidays in Switzerland and France, and collected on those occasions too. He published two articles about Coleoptera in Ent.mon.Mag. in 1895 and 1897, but thereafter appears to have confined his publishing to notes of field meetings, etc., in Proc.Trans.S.Lond.ent.nat.Hist.Soc. A specimen of Sphaerites mutilatus was given to NHM by him in 1918 (Register, 1, 1914-22) There are brief obituaries in Ent.mon.Mag., 56, 1920, 17, and in Proc.Trans.S.Lond.Ent.nat.Hist,Soc., 1919-20, 34-5. (MD 7.01)