Sir Charles Hilary Jenkinson (1 November 1882 - 5 March 1961) was a British archivist and archival theorist. Writing in 1980, Roger Ellis and Peter Walne commented that "(n)o one man had more influence on the establishment of the profession of archivist in Great Britain than Sir Hilary Jenkinson". Terry Eastwood in 2003 called Jenkinson "one of the most influential archivists in the English-speaking world".
Jenkinson's Manual of Archive Administration was first published in 1922; and republished in a second edition (revised and expanded, but not significantly altered in its principles) in 1937. It is described by John Ridener as "one of the most widely recognized treatises on the theory of archives and archival work". Some of its ideas were original to Jenkinson; others had been developed by continental archivists, but were introduced by him to Britain (and to the English-speaking world) for the first time. However, Margaret Procter argues that despite Jenkinson's "iconic" status, his work also rested to a considerable degree on an existing British theoretical tradition
Since 2007, the Department of Information Studies at University College London has hosted an annual Jenkinson Lecture named in honour of Sir Hilary. The series was established to mark the sixtieth anniversary of archival education at UCL
More information on the Wikipedia page  - including a list of his books.