Urgently searching for Australian family

Searching for descendants of Walter Ramsbottoh of Bury and Horwich, Lancashire, England at the turn of the century.Married to Eliza Holt of Bury in 1885.Had 3 children and went to live in Australia with his children but no wife.He was a Police Constable.
His wife had a son by a man named Hargreaves, Herbert Daniel, who was my grandfather.Australian Ramsbottoms may not know this.Are you a descendant of Walter Ramsbottom and Eliza Holt?Many thanks for your co-operation