"An Ugly Customer", in Gaelic "Rocdaire Granda", also known as "After the Hare", "Eleventh of October" or "Patrick O'Dermot" is an Irish reel in A Major.The parts are played AB.
An 'ugly customer', meaning an ill-natured or vicious individual, has been in slang use at least since the mid-19th century. Given the number of policemen in the Chicago Irish music scene during Chief O'Neill's collecting period, one wonders if the title for the tune was the result of occupational banter.
The reel was published in Ryan's Mammoth Collection (1883) and Cole's 1000 as "After the Hare" and in R.M. Levey's Dance Music of Ireland, vol. 2 (1873) as "Eleventh of October". The tune also appears as an untitled reel in Brendan Breathnach’s Ceol Rince na hÉireann, vol. 2 (1976). Researcher Conor Ward finds the reel in local manuscripts from County Leitrim and County Longford from the 1880's onwards with Levey's "Eleventh of October" title but also as "The Ninth of August".
It was also printed in Krassen's O'Neill's Music of Ireland (1976), O'Neill's Music of Ireland: 1850 Melodies (1903) and O'Neill's Dance Music of Ireland: 1001 Gems (1907).