Staff members were taking the loss hard , Chesbrough said .
Joy Chesbrough , the foundation 's chief development officer , told The Times that Koko ' went peacefully ' and that , despite her advanced age , her death was unexpected .
Staff members were taking the loss hard , chief development officer said .
Joy Chesbrough , the foundation 's chief development officer , told The Times that Koko ' went peacefully ' and that , despite her advanced age , her death was unexpected .