This is the bio of the author of the paper I printed out: ``History or heritage? Historians and mathematicians on the history of mathematics''. Professor Grattan-Guinness is an expert on History of Mathematics in all its width. He studied mathematics, history of science, logic and philosophy of mathematics in Oxford and at the London School of Economics and received his doctoral degrees at the University of London. He held a professorship for the history of mathematics and logic at Middlesex University until his recent retirement. He has treated a large variety of subjects (logic, philosophy of mathematics, applied mathematics, biographical studies, numerology in classical music and many others) in several books and countless research papers. In his talk, he will be discussing the special way mathematicians deal with the history of their subject.