F. A. Dahlen passed away on June 3rd, 2007. Tony was a wonderful advisor and mentor to his students and post-docs and an incredibly generous colleague and collaborator. In his long career, he wrote more than one hundred and twenty-five, without exception, seminal, scientific papers and one textbook, on global seismology and other aspects of theoretical geophysics.

Tony was a theoretician --- always, in his own words, "scribbling up some notes" --- filling his shelves with handwritten notebooks in which ultimately he completely solved hundreds of problems in geophysics and geology, using the most lucid of physical principles and the most elegant of mathematical techniques.

His profession was not one that jumped to conclusions, his craft that of careful and pure thought followed by rigorous mathematical analysis. This style, he realized, is under increasing pressure in a world that moves ever faster and a scientific climate with ever tighter funding cycles. Yet he taught many young scientists to see farther into the future, and, ever modest, supported them in their endeavors, in the foreground as well as behind the scenes.

Tony collected all of the important awards in seismology and geophysics, but he always seemed most happy doing science, and helping others do theirs. It is more than fitting that the Department of Geosciences at Princeton University should celebrate his life and science by establishing a Memorial Fund in his name, to further theoretical geophysics, either through a prize or a named post-doctoral fellowship.

Donations can be mailed to Mrs Debbie Fahey, 114 Guyot Hall. Checks should be made out to "The Trustees of Princeton University", with the memo "F. A. Dahlen Memorial Fund".