Back to the Frankensteins' home, where maids knock on the door of Henry's room.
The Baron opens the door, and the maids say they brought some of Henry's great-grandmother's wine.
You see Henry being tended by Elizabeth in the background.
The Baron makes another toast to a son in the house of Frankenstein.
(Note that you don't see Henry up close in this scene. That's because it's a different actor. In the original script, Henry died after falling from the mill. After audience reaction was negative, the end was changed, but Colin Clive had already returned to England, and was not available to reshoot.) (Source)