"Very true," said Braile. "But all could have been interested in one especial, peculiar thing which they
believed would be of benefit to or would delight the child or children to whom each was devoted. And
that peculiar article might be obtainable in only one place. If we could find that this is the fact, then
certainly that place would bear investigation."
"It is," I said, "undeniably worth looking into. Yet it seems to me that the common-interest idea works
two ways. The homes of those who died might have had something of common interest to an individual.
The murderer, for example, might be a radio adjuster. Or a plumber. Or a collector. An electrician, and
so and so on."
Braile shrugged a shoulder. Ricori did not answer; he sat deep in thought, as though he had not heard me.
"Please listen, Ricori," I said. "We've gotten this far. Method of murder-if it is murder-unknown.