Trouble at the Brownstone (Rex Stout’s Nero Wolfe Mysteries, #16)

by Robert Goldsborough

I am the cousin of one of your tenants, Ted Horstmann, who as you probably know is missing.”

Archie says the is the cousin of Theodore, but just a few minutes later he says he is Theodore's nephew.

my uncle has always been very tidy,” I told him, playing the role of the loyal and concerned nephew who was in the unit for the first time.

Archie says he is Theodore's nephew, not cousin.

looking for my cousin Ted,

Archie calls Theodore (Ted) his cousin, not his uncle. Second occurrence.

“did happen to him”

Cannot find use of this phrase prior to this point.