Sealyham Mansion, overlooking the little River Sealy,[1] is a Georgian country house in Pembrokeshire, Wales, near Wolfscastle and to the southeast of Letterston.

[2] King Edward III granted some land at Sealyham in Pembrokeshire (Wales) to Thomas Tucker in the fourteenth century.

[4] Tucker married Ursula del Holme and they built a house at this Sealyham property, which is some 200 miles (320 km) southwest of Liverpool.

It turned out the last of the descendant family members to live at the Sealyham Mansion was Catherine Octavia Edwards.

[8] It was resold in 1986 to the Sealyham Activity Centre for young people as an educational facility, run by Sam and Valerie Richards and John and Peggy Hone.

The centre offered accommodation for up to 120 people as well as catered and self-catered stays and adventure days for children and adults.

Posting on Sealyham's Facebook page the team said: "Sadly due to Covid we have been unable to keep the centre going.

[14] After Edwardes' death in 1891, other breeders began to work with Sealyhams,[14] including Fred Lewis who promoted the breed.