The proxy in Heeze dated 11 Oct. 1786 was passed in the office of the manor of Heeze, where were present Storm van ’s Gravesande and H. Bock, both “schepen” (alderman). H. Janssen was the clerk.
The marriage registration of the Fizer-Ravanel couple gives two witnesses: Marie Antoinete Hofmann widow (“Witib”) née Ravanel and the captain Francois De Kaipf.
The letter (“Brief”) nr. 864 mentioned in the book by Ulrike Leutschner seems to have been written on 18 Nov. 1786 (p. 64). I do agree that the “weitere Nichte” [an other niece] who lived at that time in Holland must have been Caroline Victoire Ravanel.
As no sea-captain of the name Rinsby can be found in Dutch archives or printed literature and this name seems to be very rare indeed and her widowship suddenly falls out of the cloud in 1790 it may very well be that Caroline invented her state of being a widower. I doubt Caroline’s widowship for a long time myself.
Your find of the burial of Mrs. Rinsly in the church in Chichester is really important and a great success. Her name could indeed be read as Rinsby. According to her approved will it was James Champ of the city of Chichester notary public who translated it from the original French to English and the Reverend George Marwood was constituted as executor.
This George Marwood probably was the Rev. George Marwood who was a canon of Chichester Cathedral. See
https://www.wikitree.com/wiki/Metcalfe-760. His mother was Anne Smelt. I haven’t yet figured out her relationship with Leonard Smelt.