origin and progress of cracks in buildings is perhaps to be
considered as unique in its way in the literature of Architecture._

_HENRY DE GEYMULLER_

_XII._

_Architectural Designs._

_I. Plans for towns._

_A. Sketches for laying out a new town with a double system of high-
level and low-level road-ways._

_Pl. LXXVII, No. 1 (MS. B, 15b). A general view of a town, with the
roads outside it sloping up to the high-level ways within._

_Pl. LXXVII, No. 3 (MS. B, 16b. see No. 741; and MS. B. 15b, see No.
742) gives a partial view of the town, with its streets and houses,
with explanatory references._

_Pl. LXXVII, No. 2 (MS. B, 15b; see No. 743). View of a double
staircaise with two opposite flights of steps._

_Pl. LXXVIII, Nos. 2 and 3 (MS. B, 37a). Sketches illustrating the
connection of the two levels of roads by means of steps. The lower
galleries are lighted by openings in the upper roadway._

_B. Notes on removing houses (MS. Br. M., 270b, see No. 744)._