Complex sentence: In addition to these unhygienic living conditions, navvies shared housing, some even sleeping on floors.As previously mentioned under the "Nationalities" heading, the majority of navvies were Englishmen, with only 30% of the group being Irish.
Split into simpler sentences: In addition to these unhygienic living conditions, navvies shared housing, some even sleeping on floors. The majority of navvies were Englishmen, with only 30% of the group being Irish.