'E DWARD HERON-ALLEN FRS: SCIENTIST' PROCEEDINGS OF TH E 4TH HE RO N-ALLEN SYMPOSIUM, 2004 Edited by JOHN E. WH llTAKER TALKS DELIVERED AT THE FOURTH HERON*ALLEN SYMPOSIUM, THE NATURAL HI STO RY MUSEUM LONDON, JULY 2004 BY RI CHARD L. HODGKINSON, MICHAEL A. KAMI NSKI, CLI VE JO NES AND AN DREW S. HENDERSON & JOHN E. WHllT AKE R OplIsculum VII Hero n- A ll en Soc iety 2005