multiple \mark items on a single measure

[Kieren Richard MacMillan]

Hello, all --

The code included below clearly doesn't "do the right thing", i.e.,  
in the final measure, I want to have a fermata over the (leading)  
barline and then the tempo indication, but Lilypond appears to ignore  
(or, at least, replace) all but the last \mark it encounters.

Is there any way to apply multiple \mark items to a single measure?

Thanks,
Kieren.

%% CODE SNIPPET BEGINS
\version "2.9.5"
tempoMarkPrep =
{
	\once \override Score.RehearsalMark #'break-align-symbol = #'time- 
signature
                \once \override Score.RehearsalMark #'self-alignment-X = #left
                \once \override Score.RehearsalMark #'extra-offset = #'( 1 . 0 )
}
\relative c'
{
        \tempoMarkPrep \mark \markup { "tempo markup" } c c c c |
        \mark \markup { \musicglyph #"scripts.ufermata" } c c c c |
        \mark \markup { \musicglyph #"scripts.ufermata" }
                \tempoMarkPrep \mark \markup { "tempo markup" }
                c c c c |
}
%% CODE SNIPPET ENDS