Watercolourist and teacher, born in Austwick, Yorkshire. He studied at Burnley School of Art, graduating in 1910. Gained a Travelling Studentship in 1911 and a RIBA Owen Jones Studentship in 1912. Leaver then taught at Halifax School of Art. He travelled widely abroad, producing such works as 'In Sunny Algiers' and 'In Morocco'. Showed at a wide range of galleries and had works bought by Burnley Corporation, settling in the town.