Welcome to the forum , retro .
There's several possible artists with that name who did/do watercolors in/of New Orleans .
Images are the best start for research here , I think .
As far as the etiquette question , one thing is to have some patience .
Folks here slog through their books , on-line resources , fellow collectors/dealers/friends & foggy brains to try and help .... this can take awhile .
Everybody here does it for free , just because they want to .
If you feel that you'd like to 'refresh' members memories (when your post(s) move further down , or even off the 1st Forum page) that you want info/input , simply add a reply to the 'orphaned' post & it will automatically move to the top of the list again !
I also think that it's nice to have as much information as you do know about an item posted with the item itself .