In July 1877, Holden wrote to Joseph Constantine asking him to call in order to advise on how to improve the heating of the house, and about the possible installation of a Turkish bath.2 Holden was unaware, when writing the letter, that as a young lad Constantine had been a hand comber at Holden's mill and had lost his job there after the invention of the new machinery. But, as he later told Mrs Holden, it was the best thing that could have happened to him.3
Constantine became a bathman in Keighley and in 1850 opened his own establishment in Manchester, adding a Turkish bath there in 1857.4 In 1866, in conjunction with Thomas Whitaker, he took out a patent on the Convoluted Stove which he later used to heat Holden's Turkish bath and which, in the intervening period, had become the most popular furnace for heating such baths.
Holden was an extremely health-conscious person and a great believer in exercise. According to Constantine, even at the age of 83 he walked regularly for one-and-a-half hours daily and on his return,
He went into his private Turkish bath, which is always kept warm, took a warm and cold shower and changed his underclothing...He takes one Turkish bath a week, and if the least out of sorts two or three.6
A more detailed account of this bath, and of Constantine's rejected original designs, appears in my Victorian Turkish Baths, pp.246-7.