Abstract: For use in anchoring cut stone trim to building structural members, the present pre-formed tapering rod anchor pockets permit adjustable alignment of the stones on erection, to eliminate re-work at the job site. Rod anchor bolts utilized are of the type having a threaded shank for mounting to the building structure, and a stone-supporting end bent perpendicular thereto. Beneath the edge at which the joint surface of a stone meets its back surface, a tapering cavity is preliminarily formed by drilling converging bores. In the edges a sinkage is then cut whose width is preferably about four times the thickness of such anchor bolt; and the tapering cavity defined by the bores is then cleared to provide the floor and ceiling surfaces. The cavity so formed accommodates the bent supporting end of the anchor bolt.