Tyrone's Ditches

Michael Harshaw's family attended Tyrone Ditches Presbyterian Church, which appears to have been a Seceder Church.  Whether the secession occurred in 1712, as the below says, or 1733, as this chart says. and this wikipedia entry says

 

The Secession Presbyterian Church

Lylehill Presbyterian Church

The Secession Church was a branch of Presbyterianism that emerged following a split in the Church of Scotland in 1712 over the issue of official patronage. Before long it had gained a foothold in Ulster and began to spread rapidly, especially in those areas where the Presbyterian Church had hitherto not been as strong. The first congregation was at Lylehill, near Templepatrick, in County Antrim. In the nineteenth century nearly all of the Secession churches were received into the Presbyterian Church in Ireland. Therefore, in the Guide to Church Recordscongregations that originated as Secession churches will be found listed as Presbyterian churches.


This book says that Tyrone's Ditches was one of these churches.