I have previously entered everything in A.B. Sias's volume 1, The Sias Family in America, and have now placed that file in Ancestry.com. Go look for the Kenneth Russell Sias Family Tree there. Hopefully it will help you with your Sias.
If it turns out to be the same Sophronia, please advise, for all I have on the family is that which is listed. Sophronia married Daniel Guild, the only child that I know of was a son, Newton.
One of the concerns is that this may not be the same Sophronia, the date is quite a ways off. Let me know, please if you have more info on this lady.
Thanks!