This is from Shannon Lush

I have a blood stain on a mattress. How do I get it off?
Get a cake of soap from the bathroom. Dip it in cold water. Shake off excess water. Scribble on stain like it's a big crayon. Rub with old toothbrush. Sprinkle with talcum powder. Leave till talcum powder goes fluffy and then you brush it off. Repeat with talcum powder until it's removed all the moisture and the soap.