It's been awhile but here is some info I've recently been given from family.
John Franklin Holden was looking for the "Bulah Land" and moved his family all over.While living in Roseburg, Oregon, they met the Irwin family, who had came from Ireland.By late 1911, the Holdens were in Dinuba, California.
Annie Holden married George Irwin in Reedley, California, 13 May 1912.
Not any more solid info on the Irwins.I is stated that the aunt and mother went to live with Irwins until mother was able to find a job.They then lived in Highland Park, close to Redlands, California.
Any of this info match yours?
Anyway, I saw this info and remembered your email inquiry and thought I'd post it.