This is by way of background information as B. L. Montgomery's name has been mentioned a couple of times above.
The Montgomery family were already living in Ireland by 1700. Their house at New Park, Moville, Donegal, was completed in 1773 by Samuel Montgomery. His son, Rev Samuel Law Montgomery and his grandson, Sir Robert Montgomery, both made improvements to New Park. It was at New Park that BLM's parents spent their honeymoon and the house passed into their hands on the death of BLM's grandfather, Sir Robert. As has already been pointed out, BLM's father's work for the Church took him to the antipodes and eventually back to London, however the family seat remained at New Park and that is to where the family retreated whenever able to do so.
Politics may not have been very important to the Bishop, he was however a signatory to the Ulster Covenant and was on a couple of occasions persuaded to be complicit in arms smuggling in a very small way. Interestingly, New Park was visited by the IRA in 1922 when they too were collecting arms. Only Lady Montgomery (BLM's mother) was at home at that time. No modern weapons were to be found, however the IRA took some antique arms picked-up long ago by Sir Robert, and some bedding. They provided Lady Montgomery with a receipt for what they took and, hospitably, she also gave them tea.
On another thread here http://1914-1918.inv...#entry1435745
mention has already been made of Lt-Col Hugh F Montgomery CMG, DSO, RMLI. who died (10 Dec 1920) of wounds received from the IRA in Dublin, where he was GSO1 with the Irish Command: the colonel was BLM's first-cousin.
[details from 'A Field Marshal in the Family'
by the late Lt-Col Brian Montgomery MBE. First published 1973 and recently reprinted by Pen & Sword, ISBN 978 1 84884 425 4]