For anyone wanting to look for the origins of the census stray Mary & Maggie in 1871 household ( images reply #30) other variations for this name are  Birchnough, Berchnough, Birchenough, Berchenough, Berchenow, Burgnew, Bercheneau 
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Further to polarbear's find... Also saw a birth 1879  Palmerston parents Frank Lampierre & Matilda Laframboise. The capital "S" must look like an "L" ...so this has happened before in the transcription...Ugh... Lampier and Semfiere?? What next?