` ::Railway Magazine June 1954 p 396 said there were 21 with the Hoy corrugated firebox — Preceding unsigned comment added by   •  04:29, 13 June 2015 ::: It says ``a total of 21 of these 0-8-0 type engines built by Hoy were equipped with cylindrical fireboxes``. This total comprises 20 built new in March-August 1903 (Horwich lot 48), plus LYR no. 392 (LMS 12771), built May 1900 as part of Horwich lot 43, rebuilt with Hoy boiler February 1902. The table given by  above describes the variants when new, which is why the figure of 20 is given.   `