The pattern is from Judy's MArtins book called Log Cabin Quilt book on page 50-54. If you are planning to make this quilt make sure to check her website first for a couple corrections to the pattern.
If your copy of Judy Martin's Log Cabin Quilt Book says, "Second Printing 2008" on the copyright page, the following corrections to Snake River Log Cabin They have been corrected in the second printing.
Snake River Log Cabin: The diagram for the Border Sash Y on page 53 should say "E" instead of "G." The drawing is correct; only its G label is wrong. The patch quantities listed for E and G in each size need to be changed as follows: Twin: 48 G and 40 E; queen: 64 G and 44 E; and wall: 16 G and 28 E. Yardage figures need no correction.
If you have already cut out or pieced your Border Sash Y units, you may cut 2" off the end of the dark G rectangles for these units before proceeding. Do not cut off the ends of the G rectangles that are used in the W blocks.