Note 1: Includes parliamentary correspondence. From 1952-1970 correspondence was filed in chronological order whereas, after 1970, it was filed in alphabetical order. The same arrangement has been maintained here. In later years e-mail correspondence has also been included. Also, there are letters from individuals, which have been included here rather than in Mb1.

Note 2: in the majority of cases the letter have been filed chronologically by the date of the topmost item (which is usually the most recent). However, in many cases there will be correspondence going back for months, or even years, attached to this item.