did search garden party +storm at sea and found a book called "a new light on storm at sea quilts" by wendy mathson. this might be the one but hard to tell if this specific pattern is included. looks like a good book though.
http://www.scribd.com/doc/37396550/A...-at-Sea-Quilts
here is another called "Storm at Sea New Quilts from an Old Favorite" by barbara smith.
amazon has both books. sure would like to see inside the books. lol