Question: St Paul's Cathedral choirboy Peter Auty performed the famous theme song for The Snowman, adapted from which author's book?

Context paragraphs:
Walking in the Air: "Walking in the Air" is a song written by Howard Blake for the 1982 animated film of Raymond Briggs' 1978 children's book "The Snowman".  The song forms the centrepiece of "The Snowman", which has become a seasonal favorite on British and Finnish television.  The story relates the fleeting adventures of a young boy and a snowman who has come to life.  In the second part of the story, the boy and the snowman fly to the North Pole.  "Walking in the Air" is the theme for the journey.  They attend a party of snowmen, at which the boy seems to be the only human until they meet Father Christmas with his reindeer, and the boy is given a scarf with a snowman pattern.  In the film, the song was performed by St Paul's Cathedral choirboy Peter Auty, and reissued in 1985 (on Stiff Records) and 1987.

St Paul's Anglican Cathedral Hall, Rockhampton: St Paul's Anglican Cathedral Hall is a heritage-listed church hall at 89 William Street, Rockhampton, Rockhampton Region, Queensland, Australia.  It is adjacent to St Paul's Anglican Cathedral.  It was designed by Louis Spier Robertson and built  1900 .  It is also known as St Paul's Anglican Cathedral Offices, St Paul's Anglican Cathedral Parish Hall, and St Paul's Day School (1902-1912).  It was added to the Queensland Heritage Register on 23 June 2000.

Dean and Chapter of St Paul's: The Dean and Chapter of St Paul’s Cathedral was the titular corporate body of St Paul's Cathedral in London up to the end of the twentieth century.  It consisted of the dean and the canons, priests attached to the cathedral who were known as "prebendaries" because of the source of their income.  The Dean and Chapter (or "Greater Chapter") was made up of a large number of priests who would meet "in chapter", but such meetings were infrequent and the actual governance was done by the Administrative Chapter headed by the dean, made up of several senior "residentiary canons", who were also known as the "Dean and Canons of St Paul’s" or simply "The Chapter".

St Paul's Cathedral, Rockhampton: St Paul's Anglican Cathedral is a heritage-listed cathedral at 89 William Street, Rockhampton, Rockhampton Region, Queensland, Australia.  It was designed principally by Annersley Voysey and built from 1883 to 1953.  It is also known as St Paul's Church of England and St Paul's Church of England Cathedral.  It was added to the Queensland Heritage Register on 21 October 1992.  The associated hall and offices were listed on the Queensland Heritage Register on 23 June 2000.

St Paul's Church, Camden Square: St Paul's Church is a church dedicated to Paul the Apostle on Camden Square in Camden, north London.  It is called St Paul's because the estate was owned originally by the canons of St Paul’s Cathedral.

The Snowman: The Snowman is a children's picture book without words by English author Raymond Briggs, first published in 1978 by Hamish Hamilton in the United Kingdom, and published by Random House in the United States in November of the same year.  In the UK, it was the runner up for the Kate Greenaway Medal from the Library Association, recognising the year's best children's book illustration by a British writer.

Claire Wood: She was born in 1963 and trained for the priesthood via the St Albans & Oxford Ministry Course.  She was ordained deacon in 2006, and priest in 2007.  After a curacy at St Peter & St Paul, Buckingham she was Rector of St Peter and St Paul Olney, and Area Dean of Newport Pagnell.  Her induction is at Leicester Cathedral on 8 October 2017.

Old St Paul's Cathedral: Old St Paul's Cathedral was the medieval cathedral of the City of London that, until 1666, stood on the site of the present St Paul's Cathedral.  Built from 1087 to 1314 and dedicated to Saint Paul, the cathedral was the fourth church on the site at Ludgate Hill.

Peterborough Cathedral: Peterborough Cathedral, properly the Cathedral Church of St Peter, St Paul and St Andrew – also known as Saint Peter's Cathedral in the United Kingdom – is the seat of the Anglican Bishop of Peterborough, dedicated to Saint Peter, Saint Paul and Saint Andrew, whose statues look down from the three high gables of the famous "West Front".  Although it was founded in the Anglo-Saxon period, its architecture is mainly Norman, following a rebuilding in the 12th century.  With Durham and Ely Cathedrals, it is one of the most important 12th-century buildings in England to have remained largely intact, despite extensions and restoration.

Trompette militaire: The trompette militaire is a loud majestic sounding organ stop, with brassy, penetrating tone.  It is noted for its installation in Liverpool Anglican Cathedral, on the fifth manual of the Henry Willis Organ in St Paul's Cathedral, London, and in the 1968 rebuild of the organ of Exeter Cathedral.  At St Paul's, the stop was a gift of Henry Willis at the time of the 1930 rebuild, the pipework being bought in from America and placed with 30 inches of wind pressure in the North East Quarter Gallery in the Dome.  The Liverpool trompette militaire was the gift of Professor Alan Dronsfield and was installed in the Corona gallery, 100 ft above the cathedral floor, in 1997.  Until comparatively recently, the organ of Exeter Cathedral also had a trompette militaire in the minstrels' gallery above the nave.  In the most recent rebuild of the Exeter instrument the stop has been renamed simply "trompette" and has been complemented with a diapason chorus forming a nave division, all playable from the main console on the medieval screen.

Supporting paragraphs: Walking in the Air The Snowman
Answer: Raymond Briggs