For a discussion on this rare group of wares see Alan Smith, 'An Enamelled, Tin-glazed Mug at Temple Newsam House', Leeds Art Calender, no. 28, 1978, pp. 14-19. A coffee-pot and cover from this group was sold at Christie's sale on the premises, Birr Castle, Co. Offaly, Eire, on 8 October 1981, lot 527, see Jonathan Horne, op. cit., Pt. IV, no. 85. Cf. also the teapot and cover sold in these Rooms on 11 February 1991, lot 5, the small mug sold in these Rooms on 12 October 1987, lot 10 and F.H. Garner and Michael Archer, op. cit., pl. 114A for a mug in the Victoria and Albert Museum. For the only recorded dated example of 1756 see Jonathan Horne, ibid., Pt. VII, no. 171