Any reference to a relationship between two people may not be as specific as you would like. A letter may indicate two women are sisters, but are they biological sisters sharing two parents or are they:
- half-sisters–sharing one biological parent?
- step-sisters–sharing no biological parent?
- sisters in the church?
Always keep yourself open to the possibility that a stated relationship may not be quite as precise as you would like.
Usually a “sister” is a full sister, sharing both parents-but there are times it is not. This is why it is always recommended to obtain as many records as possible that may state the relationship between two people as just one record may not quite shed full light on the connection.