“…Nonetheless, the Maya used blades for many purposes, and it is not easy to identify a particular obsidian blade as a blood-letting implement. Results of previous usewear analyses demonstrate that obsidian blades were used by the ancient Maya for a wide variety of functions including food processing, other domestic activities, craft-production, warfare, and, at times, ritual practices (e.g., Aoyama, 1999Aoyama, , 2001Aoyama, , 2007Aoyama, , 2009Lewenstein, 1987;Peterson, 2006;Stemp, 2016a;Stemp and Awe, 2014;Stemp et al, 2013). Both use-wear studies (Reents-Budet and MacLeod, 1997;Aoyama, 1999Aoyama, , 2001Aoyama, , 2009Aoyama, , 2014Stemp, 2016bStemp, , 2016cStemp and Awe, 2014) and residue analysis have contributed to the study of ancient Maya blood-letting (Meissner and Rice 2015;Newman, 1993;Potter, 1994;Sievert, 1992;see Stemp, 2016c).…”