- SammlungDX19 - Cotton Family Papers
- SerieF - Edward Octavius Cotton and Elizabeth (Grueber) : 184 to 218
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- Objekt199 - Letters from Edward 0. Cotton to E. Helen Grueber
- Objekt200 - Letters from S.H. Grueber and his wife to daughter Helen
- Objekt201 - Mary Spencer (nee Grueber) to sister Helen
- Objekt202 - Letters from Hannah Grueber (nee Fletcher wife of S. H. Grueber jr.)to Helen
- Objekt203 to 213 - Letters from friends to Helen Grueber
- Objekt214 - Helen Grueber (Mrs E.0. Cotton) - poetry
- Objekt215 - Drawing exercise books Helen Grueber
- Objekt216 - School exercise book - E.H. Grueber
- Objekt217 - Helen Grueber - Miscellaneous
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