Rubuta ci gaba ga wannan sakin layi - Joe Zentner ya rubuta game da asalin kamfen ɗin talla a shafin yanar gizon Desert USA a cikin "Kungiyoyin Mule ashirin da ke tafiya a cikin Kwarin Mutuwa". Bill Parkinson, tsohon mai tsaron dare na kamfanin, dole ne ya koyi da sauri yadda ake tuka ƙungiyar lokacin da aka ba shi rawar "Borax Bill". Shi ne na farko, amma ba na ƙarshe ba, da aka san shi da wannan sunan. Bikin Baje kolin Duniya na St. Louis na 1904
ya kasance bayyanar farko ga tawagar kuma ya kasance irin wannan nasara cewa Parkinson ya tafi yawon shakatawa.