Hi Marco,
I don't feel comfortable scanning the sheet and posting it, sorry to disappoint but you aren't missing much.
I wonder if ammonia was dropped from later sheets because it was considered bad for the print?
I found another reference in Hamilton Studios "the art of retouching," half the discussion of "REMOVAL OF DYE" is warning not to get too much dye on the print because it is "difficult to remove it with any degree of success"
The next paragraph suggests warm water and blotting - but this has to be done "immediately" before the dye soaks in. They also mention 1 drop ammonia 10 drops water 10% solution for darker spots.
Then they say the only other way to remove unwanted dye is bleach. They describe the companion to Spotone, Spotoff. In the later chapter on bleaching they talk about Spotoff and then they mention household Clorox 1 drop bleach to 10 drops water 10% - up to 50% if necessary. I don't think I will ever try bleaching, I don't think you should either. Complete washing is necessary afterwards if you cover a large area with bleach.
I recently made it a habit to make two identical prints from each darkroom session. One to keep in my portfolio and the other to give away to friends. Now I think I'll make three - one extra to ditch when I ruin it by spotting it badly.