Many other traditional or symbolic forms could be mentioned. The Christian cross, as the universal symbol of sacrifice, is frequently used either free standing or embossed in low relief. An interesting example, because of its appropriate adaptation to its site, is the rough-hewn stone cross on the Milford track, commemorating Quintin McKinnon who discovered the pass that bears his name. At Oihi Bay, in the Bay of Islands, a Maltese cross marks the site of the first Anglican service conducted by Samuel Marsden in 1814, and at Russell an adaptation of the same motif marks the grave of the renowned Maori chief Tamati Waka Nene.