This is one of those cases that comes down to really needing a good break or it's headed for the unsolved case heap. However, with the whole crew following every line and then following up on the same, Wolfe and company finally get that break that enables them to connect up the dots. Of course, the lines and dots were there for Cramer and company to do the same, but, as per usual, the police fail to adequately see or interpret. It's the intuitive edge coming from the brownstone that makes the difference in this veiled and layered labyrinth. Of course, after all of that, when Wolfe and Archie provide evidence to Cramer, he accuses them of having it all along and holding out more. Go figure. It's a frustrating cycle. (Holmes reflected that frustration on one occasion, commenting that, after all, he wasn't "retained by the police to supply their deficiencies.")
I found the interplay between the principals very satisfying in this one. Wolfe showed more consideration and sensitivity than customary, asking Archie for his take on whether or not the client would prefer to know the identity of her father, given that he turns out to be the pits. His solicitude toward the well-being of the elderly curmudgeon in his office was appreciable. He is more considerate of Archie. And, there are others. The man can be quite impossible in his tunnel visioned self-centeredness. But, he even bore patiently with the most invasive Cramer reaction ever. There were long discussions and collusion between him and Archie, which were both interesting and gratifying. This one may be different from some others, but has its own interest and merits.