Princess Margaret and Lord Snowdon visit Caernarvonshire in Wales.
Titles read: PRINCESS IN WALES".
General view of Plas Dinas, home of Lord Snowdon's father, Mr Ronald Armstrong-Jones.
Various shots of Princess Margaret and her husband Anthony Armstrong-Jones chatting to Ronald Armstrong-Jones and his young wife Jenifer Unite in the garden.
Several shots of nearby Caernarvon Castle with crowds awaiting the royals. Princess Margaret and Lord Snowdon visit the castle and are seen wandering about the grounds. M/S of Welsh officer with a goat; Princess Margaret looks at them then walks off. The royal couple leave the castle with the Mayor (of Caernarvon?).
General view of the Dinorwic Slate quarries. Armstrong-Jones and Margaret arrive at the quarries and are shown round. They watch men at work, chipping away slate from the quarries and blasting the face with dynamite. L/S of small explosions on the quarry face. The royal couple ride towards camera on a small quarry railway.