www.familysearch.org has likely siblings for William to TImothy Lehane and Julia Crean/Crane. Eliza x2 1869 & 1870, Michael, Denis & William. Townlands of Newberry, Milfort/Milford, Dromore. So you likely have cousins out there and other townlands to search.
The National Archives has census search you can try. www.nationalarchives.ie. Try the asterisk * wildcard search for Kilshannig/Kilshanning and note that Dromore is found as Dromone on one of these censi. Search for Crean and Lehane. You'll find Lehane in Beenalaght where my people are from.
www.historicgraves.ie may have some tombstones for your family.
I could not find marriage for Timothy Lehane and Julia Crean on irishgenealogy.ie in Mallow or elsewhere. You could search the Glantane parish registers at www.nli.ie for 1867-1869. Very time consuming and hard on the eyes.
Also try the Library of Congress site chroniclingamerica for newspapers. You may find something good there.
Good luck and have fun! Craig/Stignaz