Ephemera › HS 2910 - Invoice from Blackburn, Starling & Co Ltd, Electrical and Mechanical Engineers, Gresham Works, Nottingham 1913 Image 1 of 1 HS 2910 - Invoice from Blackburn, Starling & Co Ltd, Electrical and Mechanical Engineers, Gresham Works, Nottingham 1913 £15.00 For work at California Mills, Leek. With two duplicated letters from Leek. Add To Cart Added! For work at California Mills, Leek. With two duplicated letters from Leek.