Dear All,
The Unicodes are available from TeXShop > Edit > Special Characters (in MaC OS).
Just select a character and let the mouse hover over it. (A total of 2820 glyphs can be obtained this way.)
Here is a table of special French characters obtained in this way:
character Unicode
é 00E9
è 00E8
ê 00EA
î 00EE
ç 00E7
à 00E0
ô 00F4
For instance,
\markup{ \concat{ B \char ##x00E9 caud } }
in lyrics gives Bécaud in LilyPond output (from TeXShop input), as per the Notation Reference 3.3.3.
Incidentally, TeXShop produces this output even without changing TeXShop > Preferences > Encoding to UTF-8.
Graham
PS I think it would be useful if the doc in Notation Reference 3.3.3 said something about how to obtain the unicodes (for users who are not using a UTF-8 supported edito)r.