This vintage filet crochet alphabet was scanned from The New Filet Crochet Book: Original Designs Which May be Used Also for Cross-stich and Beadwork, With patterns Represented in a New Way, by Hugo W. Kirchmaier, preface & instructions by Anna Wuerfel Brown, Published by Cora Kirchmaier 1912

Filet Crochet Alphabet PDF file

Note- the complete book is available at the Antique Pattern Library