91 complete alphabets — medieval to modern — 3,927 decorative initials, including Victorian novelty and Art Nouveau.
Here's a sample of other books in this Dover category
Early Advertising Alphabets, Initials and Typographic Ornaments by Clarence P. Hornung 145 full-page plates present 5 centuries of great typographical design: 60 alphabets, many decorative initials, headings, scrolls and flourishes, rules and panels, ornaments, ribbons, cartouches, borders, more.
79 Decorative Alphabets for Designers and Craftspeople by Carol Belanger Grafton Over 2,000 royalty-free letters in this volume represent a highly useful and versatile resource, including 79 complete alphabets in a splendid array of styles — flowering capitals, wandering tendrils, many more.