A collection of essays and articles (draft versions), lectures and Welsh talks for radio on various subjects relating to agricultural botany, 1932 - 1969. There are also files on a weekly question and answer radio programme on which R. Alun Roberts was a member of the panel of naturalists, 1951 - 1969. There is correspondence that dates from 1925 to 1968; pocket diaries, 1920-1961; notes and research material e.g. copies of farm inventories and accounts; personalia e.g. CV; and off-prints of articles etc.
There are a number of miscellaneous items, and they include, farm accounts, 1853 - 1873; Sunday School minute book, 1889-1913; articles and newspaper cuttings etc.