I am starting to see this is a common name.
As for a family location for 1850 I am unsure as of now. I am running into some mixed things with another member here on Ancestry.This person has much of the same family with a Mary Jane Dolan from Tauton, Mass. for 1850. There dates and the dates I found are different for her. But the family they have listed under Patrick & Ellen Dolan match...even with dates.
I have some old family photos, diaries etc that list most of the people with some dates so it's very confusing. Hopefully something will pan out soon.