A suggestion. Look up the "Anglo-Argentine Society Buenos Aires" on Google. The first entry is the society in London. That might be of some help but further down the Google list you will find an entry, Argentina. Click on that and you will get on to the Society's address, Canning Club. Scroll down and you will find the address of the British Argentine Chamber of Commerce which used to be known as the Anglo-Argentine Society in Buenos Aires. There is a street address and an email address. You will find someone there who speaks English and who may know of the family. I do know there is a dentist in Buenos Aires, Andy Black, who is at least second or third generation. I hope this will prove some help for you.