Complex sentence: The transactions were facilitated by Percifer Carr, who had been a sergeant in the 48th with Edmeston and when the Edmeston brothers later returned to England, Carr would be employed as caretaker of their land.
Split into simpler sentences: The transactions were facilitated by Percifer Carr, who had been a sergeant in the 48th regiment with Edmeston. When the Edmeston brothers returned to England, Carr was employed as caretaker of their land.