During the 1990's he primarily followed conceptual approaches and conducted mail art projects. (aimiaagophotographyprize.com)
The analog mail art project that appears to be ongoing is still relevant and not archaic at all. (sfaq.us)
The Whitechapel Gallery presents Imprint 93, Matthew Higgs» collaborative 1990s mail art project in its first archive exhibition. (whitechapelgallery.org)