Ricin immunogenic in mice, rabbits, and humans. It has completed two successful clinical trials. Ricin has been involved in a number of incidents. In 1978, the Bulgarian dissident Georgi Markov was assassinated by Bulgarian secret police who surreptitiously shot him on a London street with a modified umbrella using compressed gas to fire a tiny pellet contaminated with ricin into his leg. He died in a hospital a few days later and his body was passed to a special poison branch of the British Ministry of Defence (MOD) that discovered the pellet during an autopsy. The prime suspects were the Bulgarian
A Boy Was Born set of variations for string orchestra which he was later to complete as the "Variations on a Theme of Frank Bridge". Later he was to compose a set of variations for his Piano Concerto, and his opera "The Turn of the Screw" is extensively based on the variation principle. "A Boy Was Born" was first performed on 23 February 1934 in a BBC radio concert of contemporary music. Leslie Woodgate conducted the Wireless Chorus and choirboys of St Mark's, North Audley Street, London. Sir Edward Elgar died the same day. The work takes about 32 minutes to perform. It was