Square A Day in May:
http://hookedonhandmade.blogspot.com/p/square-day-in-may....

11/22/15: I want to use this pattern for the blanket edging, 2nd picture from: Ellen Bloom’s website http://4.bp.blogspot.com/_AbImehj4LiA/SvCQb9syWyI/AAAAAAA...

And from Coco Rose Textiles website, 3rd picture.
http://cocorosetextiles.blogspot.com.au/2012/03/evening-s...

All Shawl pattern: http://www.ravelry.com/patterns/library/all-shawl#

10/31/2015 update: Decided on a flat braid join. I don’t think I’ll ever so this again. It was great fun making the blocks, but absolutely miserable joining the blocks because they all have different numbers of stitches, a challenge lining up the flat braid stitches. I ended up using a bunch of stitch markers to indicate which stitches to use.

Flat Braid Join: Sides SC, CH3, SC, corners SC, CH3, SC.
Joining: SC, CH2, drop yarn, insert in opposite block CH3 SP front-to-back, pick up yarn loop, pull loop through, CH1, SC in next ST back in block being attached.

See Bronislava Slagle’s YouTube tutorial:
https://m.youtube.com/#/watch?v=U-zqfgtQmTE

See Gourmet Crochet joining methods:
http://gourmetcrochet.blogspot.co.nz/

See another very good YT joining four corners:
https://m.youtube.com/#/watch?v=E2AyjOzWKYQ

I was inspired by DawnNN’s finished throw.