I recently requested permission from Boosey to write a setting to a translation from French by an author who falls under their copyright. The author in question is long forgotten by most of the world; I only came across her work because Britten (who was an acquaintance of hers) set some of it. I've just received a reply from the estate, via Boosey - the request is for a "50% split of the new work", a phrase which is slightly mysterious to me - do they mean that they want 50% of any money from sales (N.B. I have made it clear to them from the start that I do not intend to make money from the piece)? My main question - is this reasonable? 50% seems on the high side to me intuitively - but is my intuition correct?