Jack Griefen died on February 17th. He was 95 years old. Griefen was an industrial Realtor, working for R.M. Bradley; and then serving as senior vice president of Cabot, Cabot and Forbes of Boston; as a partner in Hines Industrial, an affiliate of Gerald D. Hines of Houston; and as a principal in the firm of Reynolds, Vickery, Messina & Griefen of Cambridge. Griefen was past president and member emeritus of the Urban Land Institute.