It is included in Stately Homes of Hutton Rudby, and it's mentioned in the accounts of Miss Winifred Rachel Blair and her scrapbooks, in the story of George Young Blair & Drumrauch Hall, in various chapters of Remarkable, but still True and so on.
But I never dealt with the garden and the grounds in any detail. However, there is a full and interesting account by Louise Wickham of the development of the gardens and parkland of the house on the website of the Yorkshire Gardens Trust. Not to be missed. You'll find it here.