Swansea saw yet another outbreak of cholera in 1866 and the local authorities were eventually forced by legislation to act. The only way to improve some areas was wholesale slum clearance, and this was the solution imposed in several regions of Swansea, notably Greenhill (current Dyfatty and Alexandra Road area), an area with massive overcrowding and consequent disproportionate incidence of cholera cases. It was populated largely by Irish immigrants, many of whom had fled the potato famines. Several of the landlords of Greenhill making great profits from their rents, and who required recompense for the loss of their properties, were local dignitaries, including Lewis Llewelyn Dillwyn, MP. (Dean)