Would you happen to know anything more about Sarah Blois and Andrew Corbett?

I find who I believe is them on the 1880 Census in Maine as follows:

1. Andrew Corbett, Head, age 29, Music Teacher, Born Scotland, Father born Ireland, Mother born Scotland
2. Sarah Corbett, Wife, age 28, Keeping House, Born Nova Scotia, Father born Nova Scotia, Mother born Nova Scotia
3. Winfield Corbett, Son, age 6, Born Massachusetts, Father Born Scotland, Mother Born, Nova Scotia

I am checking out a hunch on my great-grandfather which may turn out to be a bit of a stretch, but I am getting desperate. Any light you could shed would be helpful. Please email me & I can send you more details. Thanks in advance.