Complex sentence: Although the parent company of Densham & Sons handled the loose-leaf trade from 49/51 Eastcheap, by 1894 Mazawattee had its own offices together with warehouses and vaults i a large building erected at the top of Tower Hill, very near the Tower of London.
Split into simpler sentences: Although the parent company of Densham & Sons handled the loose-leaf trade from 49/51 Eastcheap, by 1894 Mazawattee decided to have its own offices together with warehouses and vaults. A large building was erected at the top of Tower Hill very near the Tower of London.