My girlfriend and I have been looking for information regarding W.H. McEntee.
We have a picture from Fairy Soap with the same offer for beautiful pictures on the back. The picture we have doesn't have a title either, however from your posting we believe it may be "Azaleas" by A. Romes.
On the back of ours it lists almost all the same pictures but there is one with your "Two Sisters" it is actually titled No.12 "Sweet As A Rose"