Some bits and pieces - nothing about Gustavus though...
From
www.a2a.org.uk:
Held at London Metropolitan Archives
Catalogue Ref. ACC/0448
Creator(s): Maude and Tuncliffe, London, solicitors
FILE - Certificate for Redemption of Land Tax; 1) Arabin, General William John - ref. ACC/0448/132 - date: 15 Jan. 1800
Held at House of Lords Record Office
FILE - Private Act, 29 George III, c. 52 - ref. HL/PO/PB/1/1789/29G3n138 - date: 1789
[from Scope and Content] An Act to dissolve the Marriage of
William John Arabin Esquire, with Henrietta Molyneux, his now Wife, and to enable him to marry again; and for other Purposes therein mentioned.
Also from House of Lords Record Office
FILE - Main Papers - ref. HL/PO/JO/10/7/844 - date: 22 Apr 1789 - 8 May 1789
[from Scope and Content] Apr 22 - Webb's Estate Bill. Report of Judges. Annexed: a. Petition for a Bill of Nathaniel Webb Esquire. (In Large Parchments). b. Order of reference to Judges. c. Amendments. d. Bill. Apr 22 - Earl of Winchilsea's Estate Bill. Report of Judges. Annexed: a. Petition for a Bill of George, Earl of Winchilsea and Nottingham. (In Large Parchments). b. Order of reference to Judges. c. Bill. Apr 27 - Foley v Burnell and Armstrong. Writ of error. Judgment. Apr 30 - Hastings Trial. Message from Commons for postponement. May 5 - Catholic Dissenters. Petition of, praying relief. (In Large Parchments). May 8 -
Arabin's Divorce Bill. Annexed: a. Petition of
William John Arabin. b. Petition of
William John Arabin regarding service. c. Affidavit of Henry John Milbourne. d. List of witnesses. e. Affidavit of Mr John Johnson.
Death of Caroline Arabin, age 80, Mar Qtr 1874, Wandsworth District, Vol 1d page 407
In 1871 Caroline is still living alone as widow - let me know if you want transcription...
MJP