We now have to consider the man Weiss.

Who was he?
and can we connect him in any way with New Inn?
"We may note in passing that Weiss and the coachman were apparently one and the same person.

They were never seen together.

When Weiss was present, the coachman was not available even for so urgent a service as the obtaining of an antidote to the poison.

Weiss always appeared some time after Jervis's arrival and disappeared some time before his departure, in each case sufficiently long to allow of a change of disguise.