Hanbury was a follower of Sir William Holdsworth, England's leading academic lawyer between the wars, and as his literary executor collaborated in the editing and publication of the last four volumes of Holdsworth's "History of English Law" (1952–66).
Hanbury followed in the footsteps of Sir William Holdsworth, a leading English jurist of his time, and collaborated with him as literary executor to prepare and release the concluding chapters of Holdsworth's monumental "History of English Law" (1952–66).