The wall intro which I want to fix a pair of brackets which will need to support a pair of 18 litre water cisterns is about 200 years old and appears to be a mix of mortar, stones and rough looking brick. I guess is is a typical wall construction for the period. It is a georgian style city building.
Can anybody suggest what fastening method I should use; rawlplugs and body filler, rawlbolts etc .. ?