- FondsCrook - Papers of John Anthony Crook
- SeriesD - Correspondence
- SubseriesD1 - Files of letters mostly to, with some from JAC, arranged alphabetically by sender/recipient
- File4 - Box 4, Letters K-O
- 135 more...
- Item134 - Mountaineering Club of Cambridge University (R.J. Isherwood, Secretary)
- Item135 - Mountaineering Club of Cambridge University (R.J. Isherwood, Secretary)
- Item136 - TLS from Crook to the Mountaineering Club of Cambridge University
- Item137 - Mountaineering Club of Cambridge University (R.J. Isherwood, Secretary)
- Item138 - ALS from the Mountaineering Club of Cambridge University (A.M. Binnie, Treasurer)
- Item139 - ALS from the Mountaineering Club of Cambridge University (N.G. Bruce)
- Item140 - ALS from the Mountaineering Club of Cambridge University (A.M. Binnie)
- Item141 - ALS from the Mountaineering Club of Cambridge University (A.M. Binnie)
- Item142 - ALS from the Mountaineering Club of Cambridge University (T.M. Barbour)
- 34 more...