1909 L of M R, J H M born
1921 C T D introduced
1922 S W Lfounded S S
1923 T C C opens in N Y
1930 R R creator of I W born
1984 T H becomes P L after R by P L
2003 S S c disintegrates
2005 J S appointed F B A
Thanks for pointing me in the right direction, Factor30!
(I'm kicking myself for not spotting it because Ted Hughes' biographer was Head of English at the school I taught at!):
1984: Ted Hughes becomes Poet Laureate after refusal by Philip Larkin