Gentrifrustration

The gentry have been causing trouble again in the Land of Dot. At 929.2 Family histories, there's a reference that says "For royal houses, peerage, gentry, see 929.7"; but at 929.7 Gentry--genealogy, there's a class-elsewhere note saying "Class family histories of the nobility and gentry in 929.2." What gives? And just who are the gentry anyway? We've got our own ideas (as ever), but we're checking with the experts at the British Library on this one -- watch this space.