Melvin Henriksen died October 14, 2009, at the age of 82.
You might be interested in reading his obituary, or about the conference the department held to celebrate his life and his work.

- Vita and publications.
-
Topology Atlas
with commentary by Prof.
Henriksen.
Topology Atlas is a network devoted to publicizing and describing many aspects of topology. It came into existence in late 1995 and continues to grow at a rapid rate. It describes research activity, conferences, problems and solutions when possible, aspects of the history of the subject, and its connections with other parts of mathematics.
Topological Commentary is a part of the Atlas devoted to the more human aspects of the subject that was edited by Professor Emeritus Melvin Henriksen through volume 7. Comments and questions may be posed on the TopCom bulletin board.