:::::::WCM, my proposal is: "After several abortive attempts, Luis Vernet established an Argentinian settlement in 1828 after seeking authorisation from both Argentine and British authorities." Why do you say I seek to censor the bit about British authorization? Kindly stop misrepresenting me or I'll have to drop WP:AGF in your case. 
 :::::::Also, if you think that the settlement was not Argentinian, as my sources say, you must show a source of your own, from reference texts or prominent authors, claiming that it wasn't. It's as easy as that. Wikipedia is not about finding out the truth about a certain topic; it's about finding out what reliable sources have to say about it. 
 :::::::Oh, and Vernet's promissory notes were in pesos, not pounds, and were written in Spanish, not English or German. Not that it matters, but please inform yourself.