where is located "Chimneys"?

Hello everyone.
I have a curiosity.
"Chimneys Manor" is a real place? Or is it an invention by Dame Agatha for setting her two works (The Secret of Chimneys - The Seven Dials Mystery)?
many thanks to all for your time and attention
I have a curiosity.
"Chimneys Manor" is a real place? Or is it an invention by Dame Agatha for setting her two works (The Secret of Chimneys - The Seven Dials Mystery)?
many thanks to all for your time and attention
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