Just a possibility... I can see a transcript of a Co. Londonderry Church of Ireland baptism for a John Dogherty on 9 May 1855 (date of birth 8 April 1855), parents Richard Dogherty (labourer) and Sarah Groves, St. Columb's parish, their address was 'Boom Hall'.
Edited to add: (From transcript) There was also a son James 'Doherty' baptised 23 February 1853 to this couple at St. Columb's, same address of 'Boom Hall', Richard's occupation was 'groom'.
And also a son Richard 'Doherty' baptised for this couple at St. Columb's on 8 July 1857, the address was 'Boomhall', Richard was a labourer.