Question: Who is the subject of the Springheel Saga and was said to have been first sighted in 1837?

<P0-S0>  The first series, "The Strange Case Of Springheel'd Jack", released in 2011 and starring Julian Glover, is based on the original 1837–38 Spring-heeled Jack sightings. <P0-S1>  Nicholas Parsons features in the second series, "The Legend Of Springheel'd Jack", which was released in 2013 and focuses on Spring-heeled Jack's absorption into popular culture in the 1840s. <P0-S2>  The third and final series, "The Secret Of Springheel'd Jack", released over 2015 and 2016, features Jenny Runacre and Matthew Kelly, and deals with the 1877 Aldershot barracks incident. <P0-S3>  The production was Wireless Theatre's first audio series, and is distributed as a digital download in MP3 format. <P0-S4> The Springheel Saga is an audio drama series about the Victorian bogeyman, Spring-heeled Jack, written by Jack Bowman and Robert Valentine, and produced by The Wireless Theatre Company. <SEP> <P1-S0> Although the archipelago may have been visited before by the Portuguese (who conquered Malacca City in 1511 and reached Maluku Islands in 1512 ), the earliest documented European expedition to the Philippines was that led by Ferdinand Magellan, in the service of the king of Spain. <P1-S1>  The expedition first sighted the mountains of Samar at dawn on the 16th March 1521, making landfall the following day at the small, uninhabited island of Homonhon at the mouth of the Leyte Gulf. <P1-S2>  On Easter Sunday, 31 March 1521, at Limasawa Island, Southern Leyte, as is stated in Pigafetta's Primo Viaggio Intorno El Mondo (First Voyage Around the World), Magellan solemnly planted a cross on the summit of a hill overlooking the sea and claimed for the king of Spain possession of the islands he had seen, naming them "Archipelago of Saint Lazarus". <SEP> <P2-S0> Bungaroo is a locality near St. Ives, Sydney, Australia. <P2-S1>  The location is thought to be the site where Governor Arthur Phillip and party camped on the night of 16 April 1788 on the first of many expeditions intended to find arable land that could supply the Colony with agricultural products. <P2-S2>  The colony at Sydney Cove was dependent on supplies from England, but the soils around the harbour were too poor to support crops and sustain the Colony. <P2-S3>  This trip is very historic for the Ku-ring-gai Shire, being when Europeans first entered there. <P2-S4>  It is very historic for the entire Colony or State, being when the Blue Mountains were first sighted. <P2-S5>  It is believed from later statements made by Governor Phillip that he realized on seeing such large mountains that they must have a large river with rich alluvial soils. <P2-S6>  Thus the day after camping at Bungaroo the Colony's ultimate survival was realized, and it would be very soon indeed that the Governor would direct endeavour westwards with major consequences. <P2-S7>  As all that unfolded, unto this day, some consider that Bungaroo is the sole place recognizable in the colonists' writings of 1788 which now remains unchanged from as it was then. <SEP> <P3-S0>  The first claimed sighting of Spring-heeled Jack was in 1837. <P3-S1> Spring-heeled Jack is an entity in English folklore of the Victorian era. <P3-S2>  Later sightings were reported all over Great Britain and were especially prevalent in suburban London, the Midlands and Scotland.