Is this the quilt?
http://cat-on-a-mac.blogspot.com/sea...&max-results=7
Other than using some bordering fabrics, it is simply how the log cabin blocks are placed. Deciding on the size of the blocks which look to me like the logs may be 1" logs, strips cut at 1 1/2" before sewing. I am guessing that based on how many it took to make the pattern.
Edited to add: The LC Sampler is about half way down the page. She does explain most of what she did in her comments. Deciding on the LC block size will set the tone for the quilt.