Thank you, pw. I like it.

Your post caused me to ask 'What is a firth, anyway?' my dictionary gives two definitions.

1. A narrow arm of the sea; the mouth of a river opening to the sea.

2. A wooded hunting ground, a deer park, a coppice.

Obviously a person who thought he was going into (2) when he was actually going into (1) would be in real trouble. This is probably what happened to Whos-is.

Now, does anybody know where the 'Forth' part comes from?
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'Firth' used to be 'frith.' This is another example of something I collect, moveable r's. For example, I know of a medieval song where 'bird' is 'brid' and 'bride' is 'birde.'