According to Mike Pitts in the British Archaeology Magazine (Jan-Feb 2008) the poem left inside Silbury on 25 September 1849 has a comma at the end of line six. In line fourteen, jealous Savage is used. Ditto both points in the version printed in the Wiltshire Archaeological Magazine of 1854. Volume 1, pp 302 (although ‘savage’ is spelt with a lower case ‘s’ there).

I needed to get my magnifying glass out to look at the photo of Emmie’s poem in the BritArch Mag but I think you’re right – there seems to be no comma at the end of line six. The ‘j’ or ‘z’ of jeaous or zelous is too indistinct in the photo to say which it is (though zealous perhaps would make more sense).