This comes from 'The Shadow of Happiness', by Betty Manvers:
'MIRANDA MARKHAM, who has lived all her life in a London suburb with her father, never travelling any further than the coast for her annual holiday, suddenly learns that her mother, who she has always believed died when she was very young, is the talented concert pianist Miriam Sarelle. Miriam has been mauled by a lion while on safari in Africa, and the radio reports that her right arm has had to be amputated. Gerald Markham, Miranda's father, asks her to go out to Africa to Miriam, who he feels will be in need of someone of her own. He has never ceased to love her since she left him twenty years previously. The first person Miranda meets on arrival at Livingstone is Brett Craybourne, the big game hunter who has organized the safari on which Miranda had been hurt; she falls in love with him, but realises that there is little hope of her love being reciprocated...'
It sounds a corker.
I'm glad that Miriam managed to hang on to the left arm. At least she could still perform this piece: