108

O.23

Moreover, those problems that at first blush appear to be utterly insoluble, receive in that very circumstance,—as Edgar Poe remarked in his "The Murders in the Rue Morgue,"—their easily fitting keys; They are thus particularly suited to the Play of "Musement," forty or fifty minutes vigorous thought bestowed upon one of them usually sufficing to educe from it all there is to be educed, its general solution.