Re: A Roger Zelazny reference - Ancient Ore Crusher - bravo!!
Ah ... yes. I mixed up the 1842 act (42 years for date of original publication) with the later acts that start a 50-70 year period from the author's *death*, not publication.
Apologies for misleading anyone here.
I revise my recommendation to buying "The Last Defender of Camelot", an anthology book of Zelazny's short stories including the ones mentioned here.