Salt of the earth

I was rather ineffectually spreading dishwasher salt on the pavement infront of my house the other day; it was really icy and slippery and I was worried we might not get the car back on the drive. A woman pulled up and wound down her window. I assumed she was about to ask directions but instead she offered me some pukka road grit that she’d picked up from the side of the road in Catford. She got out, spread it around, got back in her car and drove off. A lovely random act of kindness.