manxman

hi i am going to repoint some of the stone work in my house (1860's miners cottage made of manx stone) i am going to use lime mortar, can some some one tell me what mix you use for non-hydraulic lime mortar and how you mix it as i believe this is the besr route to go down, i know some companies sell lime in tubs but this is to dear due to the extorniate shipping costs to the isle man thanks