Getting a Perfect Score

Hint 1 of 20:

You only need six different locations to solve this mystery.

Hint 2 of 20:

In fact, you don't even have to visit one of those locations yourself.

Hint 3 of 20:

The Irregulars can give you the sixth piece of the puzzle.  Here's the
summary of the case:

Hint 4 of 20:

1) Guy Clarendon was 7000 pounds in debt.

Hint 5 of 20:

2) Sir Francis Clarendon cut off his son.

Hint 6 of 20:

3) Guy Clarendon had a series of unusual bank deposits.

Hint 7 of 20:

4) A beautiful woman bought a gun in Frances Clarendon's name.

Hint 8 of 20:

5) Frances didn't know why she was holding the murder weapon, and she had
blacked out in the past.

Hint 9 of 20:

6) Guy had black clothes, well-suited for burglary.