For a smaller, square-form tomb brick in the Royal Ontario Museum, Toronto, see Chinese Art in the Royal Ontario Museum, Toronto, 1972, p. 149, no. 99. Another pair of tombs bricks of comparable size to the present two was sold at Christie's New York, 19-20 September 2013, lot 1251.
The result of Oxford Authentication Ltd. thermoluminescence no. C114a75 is consistent with the dating of this lot.