Complex sentence: Although all the silver coins listed on the manifest were recovered immediately after the storm, no silver or gold ingots were listed as being on board or as having been recovered; however, archaeologists recovered some gold and over eighty pounds of silver ingots.
Split into simpler sentences: Although all the silver coins listed on the manifest were recovered immediately after the storm, no silver or gold ingots were listed as being on board or as having been recovered. But archaeologists recovered some gold and over eighty pounds of silver ingots.