I finally ordered Rigby certificates for the three rigby mausers I have, a .275, .350, and .416. The .275 was delivered to D B Crockart in 1935. The .350 was delivered to Manton & Co. in 1923. No indication whether England or India, but I assume the latter given the caliber. The .416 was delivered to "Capt T C Hallier" in 1920. There is a Capt F C Hallier who was apparently a British provincial commissioner in Africa or the Middle East about that time, but I can find no T C Hallier. Anyone have any idea? I suppose he could have been French or English.