Now I am going away, after more than two years at McGill, I would like to say hello to Denis Salter but my e-mails, apparently, do not reach him. Any idea about what is happening? Many thanks, Geraldo Ferreira de Lima 3959 rue Éthel Verdun QC Canada H4G 1S5 Phone: (514) 768-0853 Fax: (514) 768-0245 E-mail: gdelim at po-box.mcgill.ca