How sure are you concerning the arranged marriage? How sure are you that their first child was born in 1927? What was the name of their first born child?
Finding info concerning adoptions are very hard unless you know the adoption agency and place that it took place. I have many Sherman's on my side of the family but that I know of, they were born different years. Some in the 1870's and some in the early 1900's. Others after that. i can ask some of the Sherman's on my side of the family if they heard of an arranged marriage taking place somewhere around that time.