Complex sentence: Macmillan did not choose its chairman, Devlin, as he was out of the country, and he was proposed by the Lord Chancellor,, Lord Kilmuir as someone of a known conservative disposition.
Split into simpler sentences: Macmillan did not choose its chairman, Devlin, as he was out of the country. Devlin was proposed by the Lord Chancellor,, Lord Kilmuir as someone of a known conservative disposition.