- ZbirkaDX19 - Cotton Family Papers
- SerijaC - Francis Cotton : Family and general correspondence, personal papers : 66 to 133
- Family Correspondence
- Dokument66 - Thomas Cotton to son Francis
- 1 - Letter : Thomas Cotton to son, Francis Cotton, 1831
- 2 - Letter : Thomas Cotton to son, Francis Cotton
- 3 - Letter : Thomas Cotton to son, Francis Cotton, 1834
- 4 - Letter : Thomas Cotton to son, Francis Cotton, 1834