Referring to the comments about Conley's lack of expertise, I don't think anyone treats his fun little book as a piece of serious research. Certainly Mr. Conley doesn't. As Chambers mentions early on, the Flues Single Trap is certainly not engraved by Kornbrath as Conley implies. I would tend to agree with Chambers that Flues probably engraved it, although I have no knowledge of Flues, the engraver. I just feel very confident not attributing it to RK.