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A maker's name impressed into a brick's recess.
Also known as: Brick maker's mark, Frog stamp, Brick stamp, Name pressed into a brick
The frog is the recess in a brick's face, and a maker's name impressed there identifies the brickworks. It is why demolition rubble can be dated and sourced — the frog names a works that may have operated for only a few decades.
Denotes a manufacturer's name or device impressed into the frog, the recess in a brick's bed face.
Contexts: Maps
Identifies a specific brickworks, many of which operated for only a few decades, so a stamped brick can be dated and sourced closely.
Contexts: Maps
Sits in the frog because that face is not exposed in the finished wall, so the mark survives in the fabric without being visible.
Contexts: Maps
Raised or recessed capital letters spelling a works name, formed within the rectangular sunken panel on one bed face of a brick.