Do you know Mrs. Collmore?

We are hoping to find information about "Mrs. Collmore South Acton Mass."  Searching in local vital records, census data, and directories has turned up nothing about her, though her large, oval portrait ended up at the Acton Historical Society.  Perhaps she wasn't here for long - possibly she was an in-law who lived here between censuses or had her photograph taken while visiting relatives in town?  Potential variants of her name are numerous, and we don't have enough information to distinguish among them: Collmore, Collmer, Collamore, Collymore, Colomore, Collemer, Colomara, Colmeraurer, Calmer, Kohlmeyer, Kollmeier.  A (colorized) baby portrait may have come from the same source - we would like to find out if they are related.  Please contact us if you have any information about Mrs. Collmore.