The Rural Magazine, and Literary Evening Fire-Side, editor unstated. Philadelphia: Richards & Caleb Johnson. Tenth Month, 1820.
From an article describing live toads found encased in stone:
During this awful catastrophe [earthquakes and floods], these living toads were probably enclosed in their stony prisons. They were covered and buried with mud, which afterwards was hardened into stone by the active exertions of Mr. Unknown Process, a worthy old gentleman, of astonishing powers, who occasionally has the kindness to assist poor philosophers in their immense task of creating worlds.