Good day Sheila
I found the following. This is a new section in the PANB archives entitled County Council Marriage Records 1826-1887 for Gloucester, Restigouche and Kent.
County Kent
Film 15483
Page 138
Certificate Number 3985
Date of Marriage 1868-07-20
Groom Breau, Nicolas
Bride Guimond, Catherine
Also if looking in 1871 Census, look under BRO.
Hope it helps.
Ginette