Mainly C/1956 R1 but also 1P/Halley. Most prints now scanned and in online archive.

1956h Arend Roland prints to N. Rhodes
Prints from Granger to Candy
Letters to Merton and Candy from RASNZ, Hendrie, Panther, Westfall Nurrel, Blackett, Jones, Hare
Many other letters, e.g. Alan Heath, Clive Hare, C. Hunt, Alan Mercer, A. Sawford, W. Granger, J Youdale, R. Garstang, Frack Ackfield, C.F. Dale, Leonard Howarth, T. Rackham, T. Holborn, R.T. Coad, George Alcock, Hendrie, R.A.Blackett, Rob Wayland, Bernard Lovell, Hedley Robinson, W. Smith, Harlick,  Owen Ranck, Fairmont amateur astronomers W. Virginia, David Meisel, Johnny Skorve, George Habib, G. Hole, K. Brierley, W. Ogilvie (claims first UK obs after perihelion), Henry Welsh, Carter Obs NZ, N.M. Hoogenhunt

Irish Astronomical Journal paper

Copy of Astronomical Soc of the Pacific - Comets of recent years - Seth Nicholson.

Copy Strolling Astronomer vol 10, nos 9&10, 1956.

Zeiss magazine article on A-R

Miscellaneous obs and letters for 1P/Halley - 1986.