what did washington used to remove the blood stain from the floor? what happened after the stain was was cleaned?

Washington Otis used Pinkerton's Champion Stain Remover and Paragon Detergent to clean it up before the terrified housekeeper could interfere. He rapidly scoured the floor with a small stick of what looked like a black cosmetic and in a few moments, no trace of the blood stain could be seen. Immediately a terrible flash of lightning lit up the sombre room, a fearful peal of thunder made them all start to their feet, and Mrs. Umney fainted.??The storm raged fiercely all that night, but nothing of particular note occurred. The next morning, however, when they came down to breakfast, they found the terrible stain of blood once again on the floor.