hi Roy, Your lucky to have his parents names James and Agnes McCrum.. James went earlier to america it says in the book but unless proven I would be keeping a possibility he died in Ireland before 1850 if so his burial might be recorded somewhere within Carnmoney. There is ongoing research see
http://www.belfastforum.co.uk/index.php/topic,18463.0.htmlOne incomplete online website of an original incomplete and simple record of 1835 is Tithes Applotment Books 1823-1837 based upon the index work of the Irish Genealogy Hub. The relevant original books are in the Public Record Office of Northern Ireland (PRONI) Belfast. The entries include mcCrums in 3 townlands within the civil parish of Carnmoney
McCrum, Alexr.-Townland: Ballycraigy Year: 1835- Carnmoney-Antrim
McCrum, Robert-Townland: Ballycraigy Year: 1835- Carnmoney-Antrim
McCrum, Samuel-Townland: Ballycraigy Year: 1835- Carnmoney-Antrim
McCrum, David-Townland: Ballyhenry Year: 1835- Carnmoney-Antrim
MCCRUM, JAMES-TOWNLAND: Ballyhenry Year: 1835- Carnmoney-Antrim
McCrum, John-Townland: Ballyhenry Year: 1835- Carnmoney-Antrim
McCrum, Hugh-Townland: Ballyvesey Year: 1835- Carnmoney-Antrim
McCrum, Hugh-Townland: Ballyvisey Year: 1835- Carnmoney-Antrim
about 20 years plus later there are now 4 townlands mentioned references within the parish in Griffiths valuation see
http://www.askaboutireland.ie/griffith-valuation/Mc Crum-Samuel-Ballycraigy-Carnmoney-Antrim
Mc Crum-Robert-Ballycraigy-Carnmoney-Antrim
Mc Crum-David-Ballycraigy-Carnmoney-Antrim
Mc Crum-Hugh-Ballycraigy-Carnmoney-Antrim
Mc Crum-Sarah-Garden Sq.,(Ballygolan)-Carnmoney-Antrim
Mc Crum-Alexander-Maiden Row,(Ballygolan)-Carnmoney-Antrim
Mc Crum-Thomas-Ballyhenry-Carnmoney-Antrim
Mc Crum-John-Ballyhenry-Carnmoney-Antrim
Mc Crum-James-Ballyvesey-Carnmoney-Antrim
Mc Crum-Hugh-Ballyvesey-Carnmoney-Antrim
There is a continuation of Valuation s at PRONI website up tp 1922 usually if you find the right line descendants you can find them in the Irish Cenus 1901 and 1911 in
http://www.census.nationalarchives.ieeg 23 in Ballyvesey (Carnmoney, Antrim)
part of the entries read
McCrum John 54 Male Head of Family Presbyterian
McCrum Elizabeth Jane 41 Female Wife Presbyterian
switching to searching for an individual record of these time almost always leads one to church records, you will be very lucky to find his baptism or a related early tombstone etc.
see
https://www.ancestryireland.com/ However familysearch.org does have entries for hugh and his first wife Emma b Maine, also cited as E J showing he had a son William A aged 7 b California ie the US Census for 1870. and somewhere else else a daughter or son in law is cited. amongst other FS entries is a note about an Hugh probate 1868 of , leaving his farm to son James in ballyvesey
You mentioned a brother could that be Wm. H. Mccrum b 1834 ireland Retired Farmer
a widower. Fathers name James McCrum
28 Nov 1909 Jackson, Jackson, Michigan
source Michigan Deaths and Burials, 1800-1995," database, FamilySearch
anyway i leave you to exhaust familysearch
my bet is on Ballyhenry McCrum
goodluck Bally....G