Within a decade, the house was again found to be too small, and in 1883 a new extension, the Bachelors' Wing, was constructed to the designs of a Norfolk architect, Colonel R. W. Edis. Edis also built a new billiard room and converted the old conservatory into a bowling alley. The Prince of Wales had been impressed by one he had seen at Trentham Hall, and the alley at Sandringham was modelled on an example from Rumpelheim, Germany. In 1891, during preparations for the Prince of Wales's fiftieth birthday, a serious fire broke out when maids lit all the fires in the second-floor bedrooms to warm them in advance of the Prince's arrival. Edis was recalled to undertake rebuilding and further construction. As he had with the Bachelors' Wing, Edis tried to harmonise these additions with Humbert's house by following the original Jacobethan style, and by using matching brickwork and Ketton stone.