The first step is to work out the names of the criminals who were arrested on the different days of the week. The fact that John and Sherlock had no case on Tuesday helps here, as it effectively gives us a block of two days followed by a block of three. We know that the two cases concerning female criminals took place on two consecutive days (clue 3). We also know that there was another case the day after Ingrid Walsh was arrested (clue 6), meaning that these three cases took place on three consecutive days. Thus they must have been on Wednesday, Thursday and Friday.

Thus; Julia Popsley must have been arrested on Wednesday, Ingrid Walsh on Thursday and Walter Ponsonby on Friday.

This leaves Rashid Begum who, according to clue 7, was arrested the day after another case, so not Sunday.

Thus; Malcolm Bennett was arrested on Sunday and Rashid Begum on Monday.

Now we can fill in the gaps.

Now we know that Walter Ponsonby, of The Devil's Hand, was arrested on Friday, we can match him up with clue 4, which tells us that he was arrested for murder.

Malcolm Bennett was arrested on Sunday. We know from Clue 7 that this was for a case of fraud, and from clue 2 that John titled him The Creepy Man.

Julia Popsley was a kidnapper and the burglar was a man, so Ingrid Walsh must have been the identity thief in The Woman with the Twisted Wit.

That leaves Rashid Begum as the burglar in The Disappearance of Lily France's Car Tax, and Julia Popsley as the criminal in the case of The Solitary Skater.

In short;

On Sunday, Malcolm Bennett was arrested for fraud in a case John called 'The Creepy Man'.

On Monday, Rashid Begum was arrested for burglary in a case John called 'The Disappearance of Lily France's Car Tax'.

On Wednesday, Julia Popsley was arrested for kidnapping, in a case John called 'The Solitary Skater'.

On Thursday, Ingrid Walsh was arrested for identity theft, in a case John called 'The Woman with the Twisted Wit'.

And finally, on Friday, Walter 'Pit Bull' Ponsonby was arrested for murder, in a case John called 'The Devil's Hand'.

Needless to say, Sherlock was less then impressed with John's choice of titles, not to mention his literary style. That didn't stop him from getting into some very enjoyable arguments in the comments, however.

::

I hope you enjoyed this little puzzle. Did you solve it? If you did, well done! If not, don't be disheartened, these types of puzzles take a bit of practice. I might try another one, sooner or later, or you can go on my AFF net account and look under 'originals' to see some non-Sherlock puzzles I've posted there, if you'd like.

And by the way, the case titles refer to the stories 'The Creeping Man', 'The Disappearance of Lady Frances Carfax', 'The Solitary Cyclist', 'The Man with the Twisted Lip', and 'The Devil's Foot'.

Happy days :)