Thanks Andy.
For the 1881 census I can see:
1881 CAMERON Robert M 23 Dwelling: 3 Baffin Street Dundee, Forfar, Scotland
1881 CAMERON Robert M 24 Dwelling: Lower Lagg Dull, Perth, Scotland
1881 CAMERON Robert M 25 Dwelling: Easter Claypotts Caputh, Perth, Scotland
1881 CAMERON Robert M 23 Dwelling: 126 High St Perth Middle Church, Perth, Scotland
1881 CAMERON Robert M 25 Dwelling: Lower Keithbank Rattray, Perth, Scotland
1881 CAMERON Robert M 25 Dwelling: Springfield Scone, Perth, Scotland
1881 CAMERON Robert D. M 23 Dwelling: Artafallie House Killearnan, Ross & Cromarty, Scotland
1881 CAMERON Robert L. M 26 Dwelling: 145 Kennedy St Barony, Lanark, Scotland
1881 WATSON Robert M 25 Dwelling: Main Street Abernethy, Perth, Scotland
1881 WATSON Robert M 24 Dwelling: Fairfields Lodge (F & C Raily Crossing) Kippen, Stirling, Scotland
And for 1871:
1871 CAMERON ROBERT M 16 CAPUTH /PERTH
1871 CAMERON ROBERT M 16 LITTLE DUNKELD /PERTH
1871 CAMERON ROBERT M 14 LOGIEALMOND /PERTH
1871 CAMERON ROBERT M 15 LOGIERAIT /PERTH
1871 CAMERON ROBERT M 15 MONEYDIE /PERTH
1871 CAMERON ROBERT M 13 PERTH /PERTH
1871 CAMERON ROBERT M 14 RATTRAY /PERTH
1871 WATSON ROBERT M 16 ABERNETHY /PERTH
1871 WATSON ROBERT M 14 COLLACE /PERTH