All changes to tower
| Date | Change | Source |
|---|---|---|
| 30 Sep 2024 | Frames Fr1, Fr2 added | Jack Pease from the Christopher Dalton papers |
| 16 Nov 2007 | Unspecified edit | |
| 25 Jan 2004 | URL changed | Gary J Sheppard: SDGR webmaster via e-mail |
| 8 Jan 2004 | URL added | Gary J Sheppard: SDGR webmaster via e-mail |