Daniel Alexander Williamson was a watercolourist and painter of landscape and genre subjects. His father Daniel Williamson (1792-1840) was also a painter.
The younger Williamson exhibited most frequently at the Glasgow Institute of Fine Arts but also occasionally at the Walker Art Gallery, Liverpool and the Dudley Gallery, London. In 1898 he was on the list of artists invited to exhibit with the International Society of Sculptors, Painters and Gravers during JW's presidency.
http://www.getty.edu/research (accessed 2003); Greutzner, A., and Johnson, J., The Dictionary of British Artists 1880-1940, Woodbridge, Suffolk, 1980.