I like this scene. Pure exposition, explanation, recapping for the slowboats. It helps. Alas, it was cut out of the 1946 theatrical release. Confusion ensued.
“The Big Sleep is one of those pictures in which so many cryptic things occur amid so much involved and devious plotting that the mind becomes utterly confused. And, to make it more aggravating, the brilliant detective in the case is continuously making shrewd deductions which he stubbornly keeps to himself.
“What with two interlocking mysteries and a great many characters involved, the complex of blackmail and murder soon becomes a web of utter bafflement. Unfortunately, the cunning scriptwriters have done little to clear it at the end” — from Bosley Crowther‘s 8.24.46 N.Y. Times review