Vegetable Growers Supply Co., Chicago IL.

Articles of incorporation with lists of original stockholders of 1918.

List of stockholders and greenhouse locations

A good history of Rogers Park and West Ridge, showing the locations of Rose Hill, Rogers Park, and West Ridge.

Partitioning of Luxembourg and Wikipedia link. Must read to understand Luxembourg immigration and who was a “Luxembourger” during what time frame. As with most border redrawing, the people who live in the area being assigned to another country often don’t really affiliate with that country.