Signal flags
60 pictures of signal flags from 36 books, published 1820–1922, chosen from 2,343,477 illustrations in public-domain books. Free to use for anything.
60 pictures of signal flags from 36 books, published 1820–1922, chosen from 2,343,477 illustrations in public-domain books. Free to use for anything.
![An illustration from St. Nicholas [serial] (1873)](https://img.insideoutlibrary.com/img/200/ia-stnicholasserial192dodg-298-251.webp)
![An illustration from St. Nicholas [serial] (1873)](https://img.insideoutlibrary.com/img/200/ia-stnicholasserial221dodg-421-299.webp)
