A regular contributor to Family Tree magazine, Mary has written articles, some on brick walls, and two series about online resources. She is one of the panel of experts on the Q&A page and submits an occasional 'Brick Wall Special' to this. She is also an administrator for the Family Tree Forum where she enjoys helping members with their family history problems. She has contributed to Who Do You Think You Are? episodes and was the genealogist on Julian Fellowes' Great Houses series. She has also been a researcher on the Legacies of British Slave-ownership projects for University College London's History Department