cornishg on Family Tree Circles

William Cornish was a Blacksmith and married Margaret Copley in 1842 Scottish Presbyterian Church Bathurst.Both were resident at the time of their marriage at Mount York. To date I have located the offspring of William and Margaret but cannot find out where or when William or (Margaret) died or are buried. Their marriage cert
gave no details of their parents or ages at marriage. I am hoping to trace them back to their home country but not having any success. Any help whatsoever will be greatly appreciated