Quotation from: The Notebooks of Leonardo Da Vinci
Written by: Leonardo da Vinci
The elevation is drawn on the left side of the plan.
MS. B. 19. A further development of MS. B. 18, by employing for the
four principal chapels the type Pl. LXXXVIII No. 3, as we have
already seen in Pl. XCI No. 2; the exterior presents two varieties.
a) The outer contour follows the inner. [Footnote 2: These chapels
are here sketched in two different sizes; it is the smaller type
which is thus formed.]