This was an unexpected find in Noel Kissane's book 'The Irish Famine' which uses personal correspondence and newspaper articles of the times to give eyewitness accounts. 'The Pictorial Times' was published 1843-1848.
A quick search of Griffith's Valuation online finds one Patrick Brennan, tenant of Maurice O'Connell, in the townland of Darrynane Beg, Civil Parish of Kilcrohane, Poor Law Union of Cahersiveen six years later in 1852.