what kind of character is thimbletack
The Spiderwick Chronicles: 1  Thimbletack-The Spiderwick Estate's Brownie, a fairy who guards the Spiderwick mansion but, if angered, can become a vengeful and nasty boggart. 2  Later in the series he ends up stealing the Field Guide and hiding it, believing this will be for the better.he Field Guide, the first book in the series, was published in May 2003. It opens in Maine, where nine-year-old identical twins Jared and Simon and their thirteen-year-old sister Mallory move into the decrepit Spiderwick Estate with their mother, Helen.