The Rivingtons’ Accidental Contribution

The Rivingtons unknowingly bring Alan Carstairs into contact with Roger’s household and reveal the first link between him and The Grange.

increasingBearing stren­gth in each eventdecreasing

An Unexpected Invitation

An Unexpected Invitation A journey made convenient The Rivingtons take Alan Carstairs to lunch at Merroway Court after he urgently asks to see them. The visit appears to be an ordinary social favor. A useful coincidence Carstairs sees Moira’s photograph at the house and recognizes it from a picture connected to John Savage. The accidental visit directs his attention toward the people and place he had been seeking.

Questions About the Nicholsons

Questions About the Nicholsons Curiosity noticed Mrs Rivington recalls that Carstairs asked about Dr Jasper Nicholson and his wife. The questions strike her as unusual because he had not previously shown much interest in local people. A lead for the investigators Bobby, disguised as a solicitor, obtains the memory while asking about Carstairs’s movements. The Rivingtons unknowingly supply a bridge from the Savage inquiry to the supposed medical establishment at The Grange.

A Misleading Name

A Misleading Name A fabricated legal purpose Bobby poses as a junior solicitor seeking Carstairs’s address and invents a financial reason for urgency. Mrs Rivington accepts the story because he appears confident and well dressed. Useful information beneath the lie Her account confirms that Carstairs’s trip to Merroway Court may have been accidental. It also shows how ordinary social conversation, rather than official investigation, can expose useful details.

The Doubt About Chance

The Doubt About Chance Competing reconstructions Frankie thinks Carstairs followed a chance remark about the Nicholsons; Bobby wonders whether Carstairs arranged to join the Rivingtons to reach Merroway Court. Neither can prove which route he took. A mystery remains open The argument prevents the investigators from mistaking possibility for certainty. Whatever brought Carstairs to the house, his later search for Moira and the Savage story made him dangerous to Roger.

The End of the Social Thread

The End of the Social Thread Innocent witnesses The Rivingtons turn out to be unwitting participants in the route that led Carstairs to the conspirators. Their dinner visit was useful to him but did not make them part of the crimes. Ordinary life as cover Their casual invitation shows how a criminal scheme can exploit the unremarkable habits of social life. The Rivingtons help reveal the plot precisely because they do not understand it.

About a month before the final cafe confrontation

During the drive back from Merroway Court

During Bobby’s visit to Tite Street

After Bobby returns to Frankie in London

Near the end, when the murders are explained