A tall, rubble stone chimney is all the survives of another building from William Thomas & Sons shipyard (Iard Newydd) (NPRN41256). The building appears to formed part of the shipyard's outer wall (NPRN ?). The lower two thirds of the chimney is square, with upper being ciricular and made from brick. On the eastern side, there is the remains of another furnace/fireplace partially made from brick.

Sources include:
RCAHMW AP945144/66-7

RCAHMW, August 2012.