You can view Sylvia's will on this site's database, together with JMB's incorrect transcript. As Andrew Birkin has pointed out several times, the line where 'Jenny' was changed to 'Jimmy' (most probably unintentionally) has been quoted out of context by many people trying to establish JMB's duplicity. The rest of Sylvia's will clearly and unequivocally names JMB - along with Emma and Guy Du Maurier and Crompton Llewelyn Davies - as trustee and guardian to the boys, so there was never any doubt that she trusted him.