what did george v die of?
Euthanasia
entailment
 George never fully recovered . In his final year , he was occasionally administered oxygen . The death of his favourite sister Victoria in December 1935 depressed him deeply . On the evening of 15 January 1936 , the King took to his bedroom at Sandringham House complaining of a cold ; he remained in the room until his death . He became gradually weaker , drifting in and out of consciousness . Prime Minister Baldwin later said : 

neutral
 In the later part of his life , George III had recurrent , and eventually permanent , mental illness . Although it has since been suggested that he had the blood disease porphyria , the cause of his illness remains unknown . After a final relapse in 1810 , a regency was established , and George III 's eldest son , George , Prince of Wales , ruled as Prince Regent . On George III 's death , the Prince Regent succeeded his father as George IV . 

neutral
 When George III died in 1820 , the Prince Regent , then aged 57 , ascended the throne as George IV , with no real change in his powers . By the time of his accession , he was obese and possibly addicted to laudanum . 

entailment
 At the procession to George 's lying in state in Westminster Hall , part of the Imperial State Crown fell from on top of the coffin and landed in the gutter as the cortège turned into New Palace Yard . The new king , Edward VIII , saw it fall and wondered whether it was a bad omen for his new reign . As a mark of respect to their father , George 's four surviving sons , Edward , Albert , Henry , and George , mounted the guard , known as the Vigil of the Princes , at the catafalque on the night before the funeral . The vigil was not repeated until the death of George 's daughter @-@ in @-@ law , Queen Elizabeth The Queen Mother , in 2002 . George V was interred at St George 's Chapel , Windsor Castle , on 28 January 1936 . Edward abdicated before the year was out , leaving his brother Albert , Duke of York , to ascend the throne ( taking the regnal name George VI ) . 

neutral
 Two months after the end of the war , the King 's youngest son , John , died at the age of 13 after a lifetime of ill health . George was informed of his death by Queen Mary , who wrote , " [ John ] had been a great anxiety to us for many years ... The first break in the family circle is hard to bear but people have been so kind & sympathetic & this has helped us much . " 
