If your Shannon and McCormack ancestors were Roman Catholic, you'll want to look at the parish registers for the Catholic Church parish of Ballymore & Mullaghbrack, which served the congregants of the Ballymore Civil Parish in which the townlands of Tullymacann and Tandragee were located.
These registers, which go back to the year 1843, have been filmed by the Latter Day Saints (LDS) on one microfilm reel and may contain the marriage record of David Shannon and Jemina McCormack, as well as the baptism records of their children.
Please see below for information and microfilm number about these parish registers:
Parochial registers of Ballymore and Mulaghbrac, 1843-1880
Authors Catholic Church. Parish of Ballymore and Mulaghbrac (Armagh) (Main Author)
Notes: Microfilm of original manuscripts filmed at the National Library of Ireland.
The Catholic Parish of Ballymore and Mulaghbrac (variant spelling) includes the civil parishes of Ballymore and Mullaghbrack. The parish is now known as Tandragee.
Poor filming quality. Some text may be illegible.
Baptisms and marriages, 1843-1856 and 1859-1880. FHL BRITISH Film 926031
Order microfilm number 926031 from your local Family History Center.
The LDS have not filmed the Church of Ireland parish registers for the Ballymore Civil Parish. These registers go back to the year 1783. If your ancestors belonged to the Church of Ireland, you'll have to write to the parish priest and request a search of the parish registers for the marriage of David Shannon and Jemina McCormack and the baptism records of their children.
The priest for this parish is the Revd. Thomas Shane Forster, pastor of St. Mark's Church, Tandragee. Below is contact information for the Revd. Forster:
The Revd. Thomas Shane Forster,
10 Glebe Hill Road,
Tandragee BT62 2DP
If your ancestors belonged to the Presbyterian Church, please let me know and I'll see if I can find the name and address for the minister or ministers in this section of County Armagh so that you can write for information about your ancestors in the Presbyterian parish registers.
Best Wishes Grace,