Hi, Nancy,
You might contact Quilter's Newsletter Magazine to see if any of their early issues had any articles about Cuesta. This magazine has been spotlighting many quilters and their work since 1969. Also, if you can find out the colors of the quilts Cuesta made or collected, that might help with colors for the block. Ladies Circle Patchwork Quilts, a magazine now out of print, used to be a great resource, too. I only have four copies that I kept, but I'll look through them and if I find something, I'll let you know.
Judy