There is a date of March 1, 1861 along with Mayall Fecit on the lower left corner. There is a fold crease across the card.
From Wikipedia:
Prince Leopold, Duke of Albany (Leopold George Duncan Albert; 7 April 1853 – 28 March 1884), was the eighth child and youngest son of Queen Victoria and Prince Albert. Leopold was later created Duke of Albany, Earl of Clarence, and Baron Arklow. He had haemophilia, which contributed to his death following a fall at the age of 30. See photos for color, size and condition details. Note lighting variations and reflections may alter colors of item(s) in photos.
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