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.

Hint 10 of 20:

7) Guy was seen with Calvin Leach and Claude Kilgore.

Hint 11 of 20:

8) Loretta Nolan thought she was royalty.

Hint 12 of 20:

9) Guy Clarendon's room had another exit.

Hint 13 of 20:

10) Calvin Leach paid half of what an item was worth.

Hint 14 of 20:

Halliday's Private Hotel will give you information #3, 6, and 9.

Hint 15 of 20:

You can go to Cox & Company, the bank, for #9, but Clarendon's room already
has that information, so you don't need to go to the bank.

Hint 16 of 20:

Porky Shinwell gives you #1, 7, and 10.

Hint 17 of 20:

Dr. Percy Trevalyan tells you #8.

Hint 18 of 20:

S. Goff will have the information in #4.