What? McTavish has been joined by Delores the wine 'con oh sir.' When Sadie went to Wellington overnight the week before last he left a full glass of red wine carefully covered with 'glad wrap' in the library for the Sammo when she returned from school that evening.
On Sadie's return the next day this is what he found in the library in front of the Tele!
Assistance is needed to solve the puzzle since Sammo is unable to throw any light on the subject.