O'Reilly are running a Perl webcast at 9pm on Wednesday, about linked lists: http://oreillynet.com/pub/e/2715 If you're interested, sign up here: http://event.on24.com/r.htm?e=618355&s=1&k=F41DC030A6D04D988E7DCF6C6921509B Kind regards, -- Tim Retout <tim at retout.co.uk>