The John H Spilsbury who died at Moree in 1884, parents Henry Spilsbury and Louisa nee Gough, was four years old, and ( if he had lived longer ), he would have been my great-aunt's brother-in-law. He was one of their 13 or 14 children.
John D Spilsbury, who died in 1865, was an infant, and the son of Henry and Martha Spilsbury, one of eight of their children. I believe they had more than eight children, as the first was born the year after their marriage, and the next registered child was not until about 8 years later. In my long experience, registration in that region and era was eratic.
John Spilsbury who died at Wellington in 1873 was the husband of Catherine or Kathleen McDonald, and also the son of John Spilsbury and a different Martha Spilsbury. He was outlived by his father, the alleged 90-year-old who died at the same place in 1878. The Alexander Spilsbury who died at Brisbane in 1841 was a son of this John and Catherine Spilsbury.
The origin of my great-aunt's father-in-law, Henry Spilsbury (1853-1840) of Moree and Windsor is obscure. Because of this, I have made some study of ALL of the Spilsbury's in NSW and Queensland prior to World War 2. There appear to be only three families of them. The family of James and Harriet Spilsbury, arrived 1834, and their descendants, many of whom were in the newspaper business. The family of Richard and Susannah Spilsbury, arrived in 1856. And the family of John Spilsbury, supposedly born about 1788. It is my opinion that Margaret Spilsbury, who married Charles Lee at Windsor in 1840, and John Spilsbury, who married Catherine McDonald at Mudgee in 1847, and Henry Spilsbury, who married Martha Ferguson at Wellington in 1853, are all the children of this alleged John Spilsbury born about 1788. After reaching this conclusion, I came across a purported tree on the internet posted by someone who had reached the same conclusion and also found another child of this John Spilsbury.
Most of these people are not even indirectly related to me. I have investigated them to the extent necessary to verify whether Henry Spilsbury (1853-1940), who IS indirectly related to me, could plausibly be related to them. The answer to this is, no, he isn't, so we still don't know exactly where Henry came from.