ns at issue and that it not been waived. See State of Maine . United States Dept of the Interi- or, 29 F.3d 60, 71 (1st Cir.2002); United States Bollin, 264 F.3d 391, 412 (4th ar.2 ). Thus, XYZ must carry the devoir of persuasion here. [71[8] The attorney-client privilege is well-established and