Thank you, Nika!
Necrology is never fun but it is so cool to get access to such a digitized past.
I'm impressed with the support of your community, thank you again, all!
Take care,
Jean.

MERCI, carmilla/Kamil and Sroczyński_Włodzimierz, amazing replies!

Incidentally, the following search returns a record which could be the wedding of Leon's brother:
https://geneszukacz.genealodzy.pl/index.php?search_lastname=Leclere&from_date=1858&to_date=1858&rpp1=&bdm=&url1=&w=&lang=pol&op=se

> 1858 12 Lonis, Victor Leclere Charlotte, Lydia Dui Parish: Poznań św ...

Wow, thank you for the great and prompt reply! And comprehensive translation!
> 2. Where did you get the info about the death date?
From the wedding record of Léon, page 243 of: http://archives-en-ligne.seine-et-marne.fr/mdr/index.php/docnumViewer/calculHierarchieDocNum/144811/870:18257:144811/1050 ...

Hi!
Writing from California, but about a branch of my family in France.
Appreciate any help navigating your local sites in Polish...
Got two informations leading to Warsaw from page 253 of: http://archives-en-ligne.seine-et-marne.fr/mdr/index.php/docnumViewer/calculHierarchieDocNum/144811/870:18257 ...