It is curious that there are apparent gaps in the activities of this company. It is possible that more than one company with the same name existed at different times.
The first cdv is on plain edged card, and the relatively small negative number on the front suggests that it was taken near the beginning of this period. The second card is gilt edged, and is blank on the back apart from the hand written number 80718, which would surely put it at the end of the period.
The larger cabinet card below shares the same design on the back as the first cdv, which suggests it was roughly contemporary with it. (this image has been lightened to make the design on the back more easily visible) Note how the children have been given an appropriate item to occupy their hands.