The South Bend Area Genealogical Society, www.sbags.org/adoption.htm
has compiled a list of early adoption records. However the Strine name doesn't appear on the list. You should look at the list and be sure I didn't make a mistake.
That leads me to believe that the children were adopted somewhere other than Saint Joseph County.
You can find info about Indiana adoption laws at www.fccin.org/adoption-records.html
. It looks like they'll release some info but not orphanage files. Go figure! Successful Searching!