Hello
I spent some time on this yesterday.  
As you said there was an intertwining of the Roberts and the Taylor families. So went looking for wills on Scotlands People for both and on 
www.freecen.org.uk 1841 census records for both.  Scotlandwide surprisingly there appears to be a dearth of wills for anyone with the name James Robert/s  The entry below is for a James Robert  - if memory seves it's ?39 pages.
   ROBERT   JAMES   29/07/1835   RESIDING AT BURGHHAUGH OF INVERBERVIE WITHIN THE PARISH OF BERVIE       STONEHAVEN SHERIFF COURT   SC5/41/5
The from 
www.frrecen.org.uk there is the 1841 census record below.  I know the address is not the same but similar.  On the freecen site, when you check houses to the side they also have Burn in the name.  If I was you I'd send an e-mail from within Scotlandspeople.gov.uk and ask them to double check the address for the will above.
I also don't know if the family make up corresponds with what you know.
Good luck with your searching.  Regards,   Steve 
Address: Burnhaugh
________________________________________
        Surname       First name(s)       Sex       Age       Occupation       Where Born       Remarks       
          TAYLOR         John         M         60         Farmer          Kincardineshire                   
          TAYLOR         Francis         M         55         Agricultural Labourer          Kincardineshire                   
          TAYLOR         Christian         F         55         Female Servant          Kincardineshire                   
          TAYLOR         Christian         F         40         Female Servant          Kincardineshire                   
          TAYLOR         Christian         F         15         Farmers Daughter          Kincardineshire                   
          LYON         Alexr         M         14         Agricultural Labourer          Kincardineshire                   
          MILNE         George         M         13         Agricultural Labourer          Kincardineshire