1920s original John Henderson watercolor and pastel portrait on paper mounted to matt board, signed lower right on mat. I think this may be by the Scottish artist John Henderson (b.1860-1924.) but I am unsure. 

Mat is 24" by 10". Portrait is 14" by 11". 

Please see pictures for details and condition.

About the possible artist:

"Henderson was born in Glasgow and studied at the Glasgow School of Art and then obtained a MA at the University of Glasgow. He was a portrait and landscape painter. His first exhibit was in 1884 at the Royal Glasgow Institute of the Fine Arts, where he became a member of the Council. He exhibited until 1924 at the Royal Glasgow Institute, at the Royal Scottish Academy, and the Royal Scottish Society of Painters in Watercolour. In Liverpool he exhibited at the Walker Art Gallery and in Manchester at the City Art Gallery. He also assisted at the Glasgow International Exhibition (1901) and Scottish Exhibition of National History, Art and Industry (1911) and served as a Governor of the Glasgow School of Art from 1906 to 1918. He was then appointed in 1918 as Director of the Glasgow School of Art. He died suddenly in in 1924. During his working time at the Glasgow School of Art he painted a portrait of Andrew Fergus (1827-1887) MD MRCS, which hangs in the University of Strathclyde."