The only Burns I can find that marriad a Mary Coleman was Henry Murray Burns born 22 April 1877 in Birkenhead - Married a Mary Coleman in a civil ceremony in West Derby in 1901. He was a Fireman in the Merchant Navy and passed away in 1931. However in the 1911 census Marys birthpacae is stated Liverpool.

1901 census:
69, Lancaster Street, Kirkdale, West Derby, Lancashire, England

Michael Coleman Head Single Male 44 1857 Ships Painter Ireland
Bridget Coleman Sister Single Female 30 1871 Rubber Factory Ireland
Ann Coleman Sister Single Female 25 1876 Rubber Factory Ireland
Mary Coleman Sister Single Female 23 1878 ­ Ireland
Catherine Coleman Sister Single Female 22 1879 Rubber Factory Liverpool, Lancashire, England
James Coleman Brother Single Male 20 1881 Labourer (General) Liverpool, Lancashire, England.

Photo is of Henry Murray Burns from his Merchant Navy file