Complex sentence: The largest piece found was two metres in length and when it was discovered it was identified very rapidly as an internet search of "Lorina Bulwer" revealed all the publicity that surrounded the re-discovery of the first two letters/samplers.
Split into simpler sentences: The largest piece found was two metres in length and when it was discovered it was identified very rapidly by an internet search for "Lorina Bulwer". This search rapidly revealed all the publicity that surrounded the re-discovery of the first two letters/samplers.