Church decoration : a practical manual of appropriate ornamentation (1874)
Practical · London : Published for the author by Frederick Warne & Co., Bedford Street, Strand ; New York : Scribner, Welford and Armstrong · leaf 78
31. The usual shapes are illustrated. When a general scheme of decoration includes banners, it is recommended to use Shields without borders or lettering. A Shield with a simple plain … ground and one monogram or device is "best. In cutting Shields use very stout milled-board, zinc, or wood. Thin card, or any material that has a tendency to curl, should be avoided. For covering (see § 25). In cutting a shield accurately to size, the instructions under heading of " Banners " will…
Church decoration and ornament · Illumination of books and manuscripts · Christian art and symbolism
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.