2 questions - delete and old?

[Lee Jackson]

Hi,
Ive been playing around with triggers in order to provide an audit trail for one of our apps. Ive 2 problems though :-

1) When data is inserted or updated I can use new.field to get new value the value. If a field is to be updated or deleted how do I get at the old/original value? (old.field? Didnt seem to work....)

2) Possibly related to my ignorance of the above my before delete trigger seems to hang - is there anything special I should know about deletion and triggers?

Any help appreciated

Lee