> > > Not letting me bookmark help pages isn't user-friendly.
> > 
> > Agreed.  Patches to add bookmark support to help buffers would
> > be welcome.
> 
> Attached.

My bad.  I was unclear about the *Help* xref stack.  That patch worked for help
functions that expect an argument but not for ones that expect no arg.

The attached patch (against the latest help-mode.el) should DTRT.  Sorry for the
noise.