He and his two sons systematically investigated every stratum of rock to locate the source of the block they had found the previous summerl they eventually identified the productive layers, including the Phyllopod bed, in what would become the Walcott Quarry.
He systematically investigated every stratum of rock. This was in what would become the Walcott Quarry. This was to locate the source of the block they had found the previous summerl they eventually identified the productive layers, including the Phyllopod bed. His two sons systematically investigated every stratum of rock. This was in what would become the Walcott Quarry. This was to locate the source of the block they had found the previous summerl they eventually identified the productive layers, including the Phyllopod bed.