I received this image from Maria Fryer, a visitor to the site. This is what she had to say;

"as promised, have attached a picture of the catbagpipes. They come from misericords in Boston StumpUK and they were carved roundabout 1390. If you wantthe exact location, the carving is to be found on theNorth side choir stalls, lower row, 8 seats from theeast."

Thanks Maria.