Thanks for all your trouble.
Looks like I will have to rethink many of my facts.
FIRST - I now think the C. Wilkinson who came on 'Art Union' is not correct one.
The second one you mention is quite possible, as Cath. had younger sister Elizabeth, b. 1845, so they could have come for M. wedding, and returned to Wales later. Any indication on shipp. records of a return trip?
Marg.'s husband was Francis Richard Pitchford who was born in Kingsland, Herefordshire 28 Oct., 1839 - I often wondered how he met Margaret.
I believe he came to Australia on ship "Electric" with his brother Frank c. 1864.
(Sister - Elizabeth marr. Richard John Harper in Pontypool in ? c. 1867 (as their first child was born c. 1868). Possibly Catherine was also m. in Wales, as you say. I had looked previously but as I didn't know where her husb. was born, it was hard. Found quite a few Jacobs families in Wales area. Did find two marriages for a Catherine Wilkinson: Pontypool 11a 159 June 1867, and at Stockton 10a 125 but didn't find spouses.
SECOND: Maybe I was clutching at straws and the N. Jacobs who came on CJS was Charles' first son Nathaniel returning from trip to Mauritius, and not 'my' Jacobs at all. I have been in touch with many different avenues, and have found quite a lot about the Jacobs and the four sons who were partners, and even the Australian Maritime Museum, who were most helpful and sent lots of paperwork. Strangely the eldest Jacob - Nathaniel, is not listed as partner in business, but maybe he had his own destiny to follow!
Even the items on PRO listing N. Jacobs are not necessarily 'my' N. Jacobs. and the Mrs. Jacobs don't give a Christian name, so could be wives of other partners. (I am not able to go to the city and spend long hours looking at shipp. records at PRO, as have an ill husband.)
The only connection with an 'N' in my case is the cutting re wedding, and cutting on June 6, 1908 re his return to Mauritius in May 1908 which stated in part: " Mr. N. Jacobs of Mauritius...returned to Mauritius on Wed. 17th May in the 'C.J.S.', a boat belonging to the firm of which Mr. Jacobs is a partner.........."
Now, the name "Jacques" - this the name given to Mr. Jacobs in a family diary, written by James Coultas, husband of Margaret/Richard Pitchford's daughter Margaret. M. met her husb. whilst on a trip to England with her aunt, (another of Catherine W.'s sisters - Annie (Oliver)). The Coultas' came out to Australia during 1906-7, visiting Margaret's family at Mornington, and visiting 'the Jacobs' on a number of occasions at 'Woodcliffe'. Their dau., my cousin, has no knowledge of where the name "Jacques" originated......just muddies the waters a little.
Thanks for the info. re dissolution of partnership in C.J. & S. I was aware of the four partners (sons) and just couldn't work out how N. could be a partner also. Maybe the newspaper got it wrong. Many of the connections of the original Jacobs (Charles & Betsy) either by marriage, and/or Betsy's siblings, etc. also had plantations in Mauritius, and I thought N. could be a son of one of these. But no success there either!
('Woodcliffe" is a Heritage listed property still standing, and is not far from our home address, and I gnash my teeth every time I pass - thinking 'where are you Catherine?!!)