The 1871 if you haven't already got it confirms the orkney link
Deepdale, Stromness
William Manson,63, born Pitlsigo, farmer of 40 acres
Wife
Margaret Manson,65.
daughters
Margaret Manson,35
Christine Manson,23
Grandsons - John Burnett,10,scholar & James England Urton,1 (this may be James aged 11 on 1881)
Georgina Campbell,16, domestic servant
Donald Davidson,19, farm servant
William Spence,17 , farm servant