Philip Pizer has a web page on his and his wife's genalogy. His wife is an Axtell descendant. Look for his info. I found it doing a search on yahoo. I knew My gg grandmother was Lucy M. Axtell and was married to George Chambers. At familysearch I learned her parents were Jesse Miller Axtell and Mary Stillaway which made sense as my grandfather was Jesse Marshall Chambers and his father was Jesse Samuel Chambers son of Lucy and George chambers- so I guess Lucy named her son for her father. Then my grandfather was named for his father.
So then with this info I found Philip's page doing a search on yahoo. Just type in Jesse Miller Axtell and it pops up.
Now this may have nothing to do with your Mary but my ggg grandmother Mary Stillaway was born in 1809 and was 6 years older then Jesse Miller Axtell. At their marriage she wasaround 32 years old. So possibly Brewer was her first husband and maybe your ancestor. If true that would make us distant half cousins.
If you can't find Philip's web page e-mail me. I can forward the e-mail to Philip and then you 2 can compare notes.