Other ratpoison wm: how to set font?

I just installed FreeBSD and ratpoison.
I want to change the font that ratpoison uses in its help screen and status bar. I want to change it to the xterm classic 6x13 font, but I don't know what is the exact name of that font.

set font 6x13 did not work
set font '6x13' did not work

Is there a command in FreeBSD to see which fonts (+their "proper" names) are available in Xorg?

No, it did not work.
xfontsel(1) says the font that iI want is "-misc-fixed-medium-r-semicondensed--13-100-100-100-c-60-iso8859-1"

When I type that in .ratpoisonrc file
set font -misc-fixed...
set font '-misc-fixed...'
nothing happens.
I'm not familiar with this WM but you usually have to restart the VM in order for these settings to take hold. Looking through the man pages I have to admit I'm not sure what the format should be to set the fonts. I suppose it will require a bit more fiddling.
— Command: set font font

    Set the font. font is a font string like `9x15bold'.

    When called with no arguments, the current setting is returned.
Ratpoison is compiled with XFT support by default. If you want it to use older style fonts make sure you disable the XFT option in the port.