text: It prospered until, in 1839, John D'Arcy died. By that time, Clifden had grown from virtually nothing to a town of 185 dwellings, most of them three-floored, two churches, two hotels, three schools, a police barracks, courthouse, a gaol, a distillery and 23 pubs. The population had grown to 1,100 and the town already sported the (as yet unpaved) triangle of streets still visible today. Products that were shipped out from Clifden Harbour included marble, corn, fish and kelp. However, John's son and heir, Hyacinth, lacked his father's abilities and confrontations with his tenants became commonplace. In 1843, Daniel O'Connell held a 'Monster Meeting' at Clifden, attended by a crowd reportedly numbering 100,000, at which he spoke on repeal of the Act of Union.
  The town's surging growth and prosperity came to an end when the famine started in 1845. Large numbers of people died, as government help proved insufficient to deal with starvation, scurvy and other diseases. By 1848 90% of the population was on relief (receiving government money). Landlords went bankrupt as rents dried up. Many people emigrated to America. On 18 November 1850, Hyacinth D'Arcy put up his estates for sale and most of them were purchased by Charles and Thomas Eyre of Somerset. Hyacinth pursued a church career and became Rector of Omey and Clifden. Charles Eyre sold his share to his brother, who gave the estates to his nephew (Charles' son) John Joseph in 1864.
  From 1848, the evangelical Protestant Irish Church Missions were actively proselytising, seeking to convert Catholics. In 1852, their first mission church was established at Moyard Bridge, Ballinakill, Clifden, also the ICM set up orphanages, Glenowen for girls and Ballyconree for boys (opened in 1849), in Clifden, Ballyconree was burnt down in 1922. The mission in Clifden was supported by Hyacinth D'Arcy, the landlord of Clifden Castle, and, following his bankruptcy, by the Eyre family who bought the estate.