Hello, I recently came across the name Susannah Margerum Larke, in association with Frederick John Skoulding Cann. It appears he was a tutor to her - she was the deaf daughter of Samuel Cann (1781- 1854) and Henrietta Maria (Margerum) Cann, daughter of Samuel Margerum. I also have a photo of a memorial plaque in remembrance of F.S.J. Cann and S. Margerum Larke.
My branch of the Canns originates from Wymondham, Norfolk.