Notes on Breeding of Black Redstarts in Kent

IN the summer of 1940 I was fortunate enough to be able to make some observations on two pairs of Black Redstarts (Phasnicurus o. gibraltariensis), which I found breeding in the Medway area in Kent. I watched the first pair ("A") as often as possible and made full notes, but the other pair ("B") I was able to observe only on a few occasions. The following account drawn from my notes may have interest ...