Why Would A 4 Year Old Be Interested In The Duke Of Devonshire

This is a card from 1905 sent by an aunt to her 4 year old niece. For some reason she brings out a point about the Duke of Devonshire, whose property id shown on the front of the card.

This card presented some challenges because the address on the card could best be described as approximate and marriage of the recipient took place overseas in Iran.