gauged mortar
Webster's Dictionary (GCIDE)
Gauged \Gauged\, p. a. Tested or measured by, or conformed to, a gauge. [1913 Webster]
Gauged brick, brick molded, rubbed, or cut to an exact size and shape, for arches or ornamental work.
Gauged mortar. See Gauge stuff, under Gauge, n. [1913 Webster]