No, I think the real Harry is probably Ian (Harry) Harris:

http://www.cru.uea.ac.uk/cru/people/

The name fits, and his specialties are listed as follows:
“Dendroclimatology, climate scenario development, data manipulation and visualisation, programming.”
That is the only match for “programming” on the page. His email address is provided.
Come on alternative media, interview this guy. Come on publishers, give him a book deal.