number carved in stone covered with lichen 1819

abstract adams aged alabama anno annum areolate bank born botany carved cemetery century chronology clean cleaning close common compromise covered craftsmanship crossing crustose cryptogamia cryptogamic cryptograms date decade died dimelaena discolored domini era etched events funerary geologic geology gravestone growth historical history lepraria leprose lichen lichenology macrolichen masonry mdcccxii millenium missouri neglect neglecta norwich number numerology obscuratum onis oreina polsporina raffles rhizocarpon rock savings simplex singapore spores stone texture textured thalli thallus timestamp transatlantic treaty ugly university unsightly variety year