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
Isometric drawing of a terracotta pan tile ... G. P. Stevens ... PD 1753 ... 1949
