Note 25 — LETTER VIII.

See my essay “On the general employment of the Pointed Arch in Germany in the Tenth and Eleventh Centuries,” as an Introduction to H. Gally Knight’s Progress of Architecture from the Tenth to the Fourteenth Century under the Normans, from the English; Leipsig, 1841; and my father’s treatise, “The Dome of Naumburg,” by C. P. Lepsius, Leipsig, 1840 (in Puttrich’s “Monuments of Architecture,” II. pt. 3, 4).