I have some severely under exposed negs that I haven't processed yet. FP4+ (125) mistakenly metered at ISO 3200. The situation was in full sun and quite contrasty. Metering is likely to be a good average but 4.5 stops under exposed. Any suggestions on chemicals/timing for extracting the best I could from these or is there really no hope???

The images are of a good friend of mine in intimate conversation with Elliot Erwitt (yes from Magnum) yesterday and would have huge sentimental value for her. I would be v greatfull for any suggestions.