Isometric drawing of a roof with curved terracotta tiles: pan tiles not wedge shaped ... G. P. Stevens ... PD 1750 ... 1949
Isometric drawing of a roof with curved terracotta tiles: pan tiles wedge shaped ... G. P. Stevens ... PD 1751 ... 1949
Correct (A) and incorrect (B) overlapping of curved terracotta pan tiles ... G. P. Stevens ... PD 1752-a PD 1752-b Horizontal (normal) ... 1949
Restoration of the standard tiles for ridge pan and ridge cover tiles, derived from a roof of pan and cover tiles like those of the Tile Standard ... G. P. Stevens ... PD 1754 ... 1949
