Looks like it took an extended period to settle his estate as there appear to be multiple claims on his Estate. His file would have all the details and make an interesting read.
http://www.archivessearch.qld.gov.au/Search/ItemDetails.aspx?ItemId=2809895Series 4486 ID 2809895 Ecclesiastical (will) file CUBBON William 8583 Start date 1/1/1857 End Date 31/12/1900
Queensland Times, Ipswich Herald and General Advertiser 11 Sept 1877
https://trove.nla.gov.au/newspaper/article/122575195Intestacy Notice To Creditors
The Brisbane Courier 26 Oct 1878
https://trove.nla.gov.au/newspaper/article/1376055Letters of Administration
William Cubbon, late of Brassall
The Telegraph Brisbane 2 Feb 1895
https://trove.nla.gov.au/newspaper/article/173757124IN THE SUPREME COURT OF
QUEENSLAND.
Ecclesiastical Jurisdiction.
In the WILL and CODICIL of WILLIAM CUBBON, late of Jeebropilly, near Ipswich, in the Colony of Queensland, Free holder, deceased.
Notice is hereby given that, after the expiration of fourteen days from the publication hereof, application will be made to the said Honourable Court that LETTERS of ADMINISTRATION, with the Will and Codicil annexed, of all and singular the Lands, Goods, Chattels. Credits, and Effects of the
abovenamed William Cubbon, deceased, may be GRANTED to HENRY SCHACHT, of Brisbane, in the Colony of Queensland, Solicitor, and lawfully constituted Attorney of Esther Wood (formerly Esther Cubbon), of 14 Highfield street, Liverpool, England, the wife William Wood, of the same place, retired Team Owner, a devisee and residuary legatee under the said Will.
The Brisbane Courier 17 Nov 1913
https://trove.nla.gov.au/newspaper/article/19914293Name of Deceased Proprietor-William Cubbon late of Jeebropilly, near Ipswich
Date of Death -22nd August 1877
Name of Claimant-Esther Wood (nee Cubbon) wife of William Wood, of Liverpool EnglandDaily Standard 6 May 1918
https://trove.nla.gov.au/newspaper/article/179401726Name of Deceased Proprietor. William Cubbon, late of Jeebropilly, near Ipswich.
Date of Death.—22nd August, 1877.
Name of Claimant.—Margaret Ann Martin, wife of Thomas Philip Hugh Martin.
Description and Situation of Land: Portions 120, 121, and 139, county of Churchill, parish of Jeebropilly.
Estate Claimed to be Transmitted.—Estate in fee-tail.