Jim Hailstone arrived at Harwell in the early 1950s. There was a good deal of experience of the use of card machinery for scientific computation at the National Physical Laboratory. When Harwell set up a Punched Card Machine section around 1953 they lured Jim (and his wife, Elizabeth) from NPL to run it.
Some examples of the tasks accomplished by the Hollerith 555 are described in a paper by Jim on its scientific computation capabilities.
He also produced a card-based system for supporting the Harwell Library.
Jim went on to run the Mercury at Harwell before moving on to run Atlas Laboratory's Operations Group throughout the Atlas period. Jim was a statistician and there are papers related to that side of his work on this site as well.
Jim Hailstone died in 2007. Bart Fossey spoke at the funeral; Pat Athawes, Doug and Judy House, Paul and Julie Bryant, Mike and Lorna Claringbold, Anne Shrimpton, Ines Vollmer-Day, Judy Herring, Trevor Amos, Bob Hopgood and many others attended the funeral service.