- [S324] Lansdell family tree, Judith Lansdell, (March 1999;).
recorded as Les Ayres
- [S205] FreeBMD, (www.freebmd.org.uk;), birth registration of Joseph Victor Lansdell, Islington 1b 211, March quarter 1889 (Reliability: 2).
- [S112] Civil Registration Death Indexes 1837-, General Register Office, death registration of Joseph V. Lansdell, 76, Hendon 5e 617, March quarter 1964 (Reliability: 2).
- [S205] FreeBMD, (www.freebmd.org.uk;), marriages of Henry Hugh Lansdell and Ada Emma Freeman share reference Islington 1b 379, September quarter 1881 (Reliability: 3).
- [S205] FreeBMD, (www.freebmd.org.uk;), marriages of Joseph V Lansdell and Martha E Willis share reference Islington 1b 546, June quarter 1911 (Reliability: 2).