Musti and I have been walking in Mt. Hope Cemetery nearly every weekday morning since early 2005 (joined by Luc in September of 2009), walking in roughly the same areas each day, so it wouldn’t be a terrible exaggeration to claim that I’ve seen this odd gravestone more than 2000 times. The odd streak of clean white marble caught my eye from the beginning; I also noticed that there was a weathered copper spike, covered in green copper sulfate, coming out of the top of the monument (probably an attachment for a long-lost decorative sculpture). But I wasn’t able to put together a convincing story to explain the unusual appearance.  I was assuming that the rest of the marble was darkened due to air…