Thought I'd have a try, too. First, I convert the file to a 16 bit TIFF (what's that, 64,000 shades of grey? Well, for greyscale images but - gotta love it!). I use the Power Retouche plug-in filter "Black and White Studio" for my conversions. I chose the Ilford HP5 emulation, because that's what was most often used for available light concert photography. I used a multigrade filter setting of 2, because that is often a good choice for portraiture (although in real life I would probably be using a 3 for HP5). I brought the exposure up, reduced the contrast a little, and enhanced both the highlights and shadows.
Back to Photoshop, to get rid of the dust; mostly in "Darken" mode, and at 200% view.
Now, because my low contrast B&W conversion has taken the pure blacks out, I am going to duplicate the background layer and put a "Levels" adjustment layer on it. I'm changing the Gamma to 1.15 to lighten it a bit, and moving the Black slider in to 5; not enough to give a pure black, but I don't know how you are going to print this so I am leaving a little leeway to keep the blacks from blocking in during printing.
That looks good so I am going to hide the background layer and use "Merge Visible" to collapse the top layer with the Levels adjustment.
Now I could go with this version; but. let's play a little. I'm going to apply the Power Retouche "Soft Filter" at 50% with a 10% spread, but at 0% in the darks, 100% in the midtones, and 50% in the lights.
The size and the resolution are a little odd; so I am going to change that using PhotoZoom Pro3 (originally, S-Spline Pro) and while I am at it I am going to see if I can reduce the JPG artifacting a bit.
That's on my other photo editing computer though (I have minimal software here on my Internet computer) so I am going to switch over to that.
Still didn't clear all the JPG artifacts so I will run a hybrid median filter to take care of that; then I am going to do a few somewhat odd things (duplicate images, blurring one then dividing it into the other, and using the result) to sharpen and darken this image up a bit without affecting any residual JPG artifacts.
Personally, I like to add a little toning to my black and white images but not always and certainly not everyone does.