They look to be from the early 1900s most likely from one of many different French Clothers of the time.
The Drummer Girl is a classic Neo design that was all the rage in the first half of the 1900s. The Indian Maiden looks like to be something that was wore by a French Burlesque circ WWI.
These design were found allot during the time period of 1900-1930 and were called by various names I know then a Neo-French Revolution Style.
If you can find an artist name on any of the prints I might be able to get you more information. Most artist of that time period signed the prints in the lower right hand corner