William Grey was an assiduous diary writer. From the late 1840s until his death he wrote up his diary almost every day, with very few breaks. The entries contain detailed information on the day's weather, visits made and received, church business and details of Sunday services conducted, personal and family activities, other occurrences and his state of health.
Typical diary entries: "Fine with SW wind. I finished my SE view of the Church & PM walked by Chilworth to Bishopstoke, & went by the 5.10 train to Winchester, where I remained for the night" (1 April 1854); "Wet early & late, showery most of the day with SW wind. AM I walked into Bournemouth & made calls, lunched with Mr Boyd who drove me home & took back Miss Boyd" (30 January 1860).