mermaid - yes I do have more exciting things to do than correct spellings on the answerbank, if I didn't have I would spend all day correcting things like 'do you no were they got there dress from' to do you know where they got their dress from. It was just your question heading was stationary and I couldn't resist. It is actually quite an easy one to remember as it is e for envelopes, a for car (as in not moving). Sorry if I upset you and also that you haven't had a good response. I can't say it's the sort of thing I've come across at all.
BTW I asked a question last week and got no response at all.