Using the links posted in the above thread.
Census info
1861/Upper Musquodoboit
David Reid 5 males 1 female total 6
John Reid 3 males 4 femals total 7
they are on same page 2 lines apart. there are 2 entries for Upper Musquodoboit and 9 for Musquodoboit. You may want to look at Reid's in other parts of the counties.
1871 Census/Nova Scotia/Upper Musquodoboit/Page 30
David Reid, age 40, occupation carpenter
Jannet, age 41
George, age 17
Charles, age 15
Frederick, age 10
Jessie, age 7
Elizabeth, age 4
Ellen, age 2
David, 1 month
Page 16
Reid, John, 50, presbyterian, millwright
Marthaann, 38
George, age 21
Maryann, age 20
Martha, 17
Jane, 14
Elizabeth, 12
William, 10
Esther, 8
Barbara, 6
Ruth, 3
John 1
David and John could be brothers.
1881/Nova Scotia
Reid, David
Janet
on one page and the children on the folling page
Frederic, 21, farmer
Jessie, 17
Bessie, 13 (Elizabeth)
Nellie, 11 (Ellen)
David, 10
Sydney, 5
1891/Halifax County/Polling District 22/
Reid, David, 60, carpenter
Janet, 62
Fred
Bessie
Nellie
David
Sydney
I didn't look at 1901/1911/1921 but they are available at LAC/Ancestry and 1901/1911 at Automated Genealogy