Correspondence that resulted in the production of microfilms PMB 1 - 999 of the Pacific Manuscripts Bureau between April 1968 and April 1985 when Robert Langdon was the Bureau's Executive Officer. The correspondence is filmed in numerical order by microfilm number. In some cases, the correspondence extended over several years and resulted in the microfilming of a large number of documents on several or many reels. Where the documents were not filmed in a continuous sequence, e.g. PMB 36 and PMB 600 (papers of Gordon Thomas), the correspondence has been cross-referenced. For some reels of film, there is no correspondence - arrangements to film a manuscript or collection having been made by word of mouth. In those cases, the only background information available to researchers is that contained on the relevant information sheet(s).<BR>The correspondence covered by each reel is as follows:<BR>Reel 1: PMB 1 - PMB 100<BR>Reel 2: PMB 101 - PMB 429 (to letter of 20/3/1973)<BR>Reel 3: PMB 429 - PMB 908<BR>Reel 4: PMB 909 - PMB 999