Complex sentence: During the construction of the former Supply Reserve Depot, workmen discovered human remains, some of which were found in lead coffins with scallop-shell decoration; no official record of the discovery was made, as much of the lead was sold as scrap metal.
Split into simpler sentences: During the construction of the former Supply Reserve Depot, workmen discovered human remains, some of which were found in lead coffins with scallop-shell decoration. No official record of the discovery was made, as much of the lead was sold as scrap metal.