In 1831, The 12th Earl of Cassilis became first Marquess of Ailsa, taking the title from the Craig, which was his property.
The Kennedy family, Earls of Cassilis famously obtained the lands of Crossraguel Abbey through the torturing by Gilbert Kennedy, 4th Earl of Cassilis of Allan Stewart, the commendator at his castle of Dunure.
When the Marquess of Ailsa took over the line in 1967 a display of disused locomotives was created at the station.
Charles Cornwallis, 1st Marquess Cornwallis | Robert Gascoyne-Cecil, 3rd Marquess of Salisbury | Marquess | Francis Rawdon-Hastings, 1st Marquess of Hastings | Richard Wellesley, 1st Marquess Wellesley | Marquess of Bute | Wills Hill, 1st Marquess of Downshire | James Broun-Ramsay, 1st Marquess of Dalhousie | David Cecil, 6th Marquess of Exeter | Robert Grosvenor, 1st Marquess of Westminster | Henry Paget, 1st Marquess of Anglesey | Frederick Hervey, 8th Marquess of Bristol | Frederick Hamilton-Temple-Blackwood, 1st Marquess of Dufferin and Ava | Victor Hervey, 6th Marquess of Bristol | Robert Wynn Carrington, 1st Marquess of Lincolnshire | Marquess of Rockingham | Marquess of Lansdowne | marquess | John Neville, 1st Marquess of Montagu | Freeman Freeman-Thomas, 1st Marquess of Willingdon | Paul Marquess | Marquess of Milford Haven | Marquess of Anglesey | Marquess of Ailsa | John Hamilton-Gordon, 1st Marquess of Aberdeen and Temair | Ailsa Craig | William Parr, 1st Marquess of Northampton | Victor Hope, 2nd Marquess of Linlithgow | Marquess of Sligo | Marquess of Salisbury |
The system closed after the 1965 season but was briefly revived when the Marquess of Ailsa obtained a lease and reopened all three routes in 1967.