[MaC] An Almighty Row: Fitzroys' Flat

[Mel Mason]

>> The back canvas of the painting showed a suspicious bulge, as though
>> something had been slid behind the canvas back.  And some of the tacks 
>> that
>> held it in place appeared to have become loose.
>
> "Hmmm..."  On the theory that anything unusual that turns up in
> the course of a murder investigation is automatically
> interesting, Marion carefully repositioned the painting so that
> it was leaning against the wall with the back showing.  Then,
> extracting from her bag the handkerchief she'd used in collecting
> the teacups, she proceeded to work loose the tacks so that she
> could find out what was creating that suspicious bulge.
>

Inside there were three envelopes, each containing rather thick letters.