- [S324] Lansdell family tree, Judith Lansdell, (March 1999;).
recorded as Les Ayres
- [S28] British Isles Vital Records Index, The Church of Jesus Christ of Latter-Day Saints, (Second Edition, 2001;), baptism of Jane Philadelphia Lansdel, daughter of David Lansdel and Harriet, 15 Apr 1883, Upper Dicker, Sussex (Reliability: 2).
- [S205] FreeBMD, (www.freebmd.org.uk;), marriages of David Lansdell and Harriett Brett share reference Hailsham 2b 179, December quarter 1877 (Reliability: 3).
- [S205] FreeBMD, (www.freebmd.org.uk;), marriage of Gordon E Martin and Jane P Lansdell, Uckfield 2b 285, June quarter 1912 (Reliability: 3).