A fact from Diary (stationery) appeared on Wikipedia's Main Page in the Did you know column on 27 May 2009 (check views). The text of the entry was as follows:
Did you know... that the first annual diary with printed daily sections for notes was published in 1812?
The ODNB has biographies of both John Letts and his son Thomas. The former references F. Vivian, ed., Letts keep a diary: an exhibition of the history of diary keeping in Great Britain from 16th–20th century in commemoration of 175 years of diary publishing by Letts (1987) [exhibition catalogue, Mall Galleries, London, 28 Sept – 25 Oct 1987], and W. H. Beable, "Charles Letts's diaries", Romance of great businesses, 2 (1926), 211–20. The latter has a reference to Charles Letts & Co., The romance of the business of a diary publisher (1949). --Hegvald (talk) 18:46, 24 May 2009 (UTC)[reply]