When Betty and her lawyer get in the car to go to Chinatown to get the letter, Betty enters the car first from the left side, the lawyer second. When they get to Chinatown, Betty gets out of the left side of the car first, followed by the lawyer.
When Betty and her lawyer are in Chinatown to collect the letter from the widow, there is a padlock on the door while they are waiting outside the building. Seconds later, a man unlocks the door from the inside.
We see Leslie faint and taken to see the nurse. The nurse leaves the room and Leslie is talking to Howard Joyce but behind Mr. Joyce is a shadow of a piece of equipment or crew visible on the room divider behind Mr. Joyce. The equipment is pulled back and the shadow disappears.