Grandma Porter in Front of Her House

Uploaded for the Vintage Photos Theme Park theme of: On the Street Where You Live.
(Although this is admittedly a rural rather than a residential setting).
I bought this "photo on cardboard" at a garage sale in East Middlebury from a descendent of "Grandma Porter" the pregnant woman in the picture. The man is unknown but very likely her husband.
The friendly man who sold it to me told me that the house burned down not too long after this picture was taken - but that no-one was hurt.
Looking at Family Search I think this is possibly:
Etta (Esther Jennie Currier) Porter with Frederick M Porter - and that she will have a son, Roy Fred Porter, born May 10, 1901.
Penciled on the back:
Grandma Porter c. 1901 Taken near Glover, VT
Imprinted:
Bartonia Photo Co. Boston Mass.
Since the town of Barton is only 2 miles away, I wonder if "Bartonia" is a local licensee of the Boston Company?
The town of Glover is in the area of Vermont called the "Northeast Kingdom".