Why didn't they ask Evans? Agatha Christie

Why Didn’t they ask Evans? Agatha Christie
So we meet our primary character Bobby Jones playing golf with local Dr Thomas – together they find the body of a man very near to death. Bobby stays with the man while the Dr goes for help and hears the dying man’s final words, “ Why didn’t they ask Evans?”. Bobby presumes this to be of no importance but does see a photograph fall from the man’s pocket of a beautiful girl – but he puts it back to keep with the body.
Shortly after a Mr Roger Bassington-French appears and takes over supervising the body as Bobby has to get back for Organ Practice – but why is he even there? He said he was there viewing houses, but was he?
 
However at the inquest they state that the body was identified from a picture of his sister that was found with the body – however the lady that comes to the inquest purporting to be the sister looks nothing like the photo.
 
From this point Bobby’s curiosity is stirred and with the help of local Earls daughter Frankie Derwent they decide to investigate further. Shortly after Bobby while napping is poisoned and that seals it for them that this was not a simple accident.

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