This s a vintage pattern from a crochet book published in 1912. The link is to the page with the beginning of the pattern, the entire book is available online as a free PDF download from the Hathi Trust.

The basic pattern is a very easy bottom-up shawl worked in one piece, with a design that alternates a shell-between-shell with a shell-in-shell stitch pattern. It works up incredibly quickly with a lovely fluffy texture!

This pattern should work equally well with nearly any yarn weight, and the very simple basic triangle design would lend itself to a variety of border designs beside the one shown in the book.

Also available here.