For a definition of "wapentake", see the article entitled Hundred (county division) in Wikipedia.
Wapentakes, the Old Norse form of the Anglo-Saxon "hundred", are dealt with in Section 1.4, but Sections 1.1 (Hundred courts) and 1.2 (Administrative functions) deal with the concept and purposes of wapentakes along with those of "hundreds" used in English counties further south.
Bulmer Wapentake was located in the southernmost part of the North Riding of Yorkshire. It was bounded by Ainsty and the Upper Division of Claro Upper Wapentakes on the south and southwest, Buckrose on the east, and Rydale on the north.
It contained the ecclesiastical parishes of Bulmer, Alne, Bossall, Brafferton, Brandsby, Clifton, Crambe, Crayke, Dalby, Easingwold, Foston, Gate Haxby, Helmsley, Heworth, Holtby, Huntington, Marton cum Moxby, Myton on Swale, Newton upon Ouse, Osbaldwick, Overton, Sheriff Hutton, Skelton, Stillington, Stockton in the Forest, Strensall, Sutton in the Forest, Terrington, Thormanby, Upper Helmsley, Warthill, Whenby, and Wigginton.