Portrait of painter Mathias Alten.

Portrait of painter Mathias Alten.

Portrait of painter Mathias Alten.

Portrait of painter Mathias Alten.

Portrait of painter Mathias Alten.

Bertha Schwind Alten, wife of painter Mathias Alten.

Portrait of painter Mathias Alten and friend Rudy Heubner, 1893.

Portrait of Bertha Schwind Alten, wife of painter Mathias Alten.

Portrait of painter Mathias Alten.

Sketch of Mathias Alten by Ray Barnes, published in the Grand Rapids Press. One illustration used in article, ""G.R. artist began his notable career near inspiring German miracle spring.""

Sketch of drawing class by Mathias Alten. captioned ""Mr. Alten's life class at work, with well draped model posing, from a sketch by Alten.""

Wheels--The world's oldest, greatest and simplest invention"" April 1921 cover illustrating an article in The Commonwealth: A magazine for workers painted by Mathias Alten.