In order to get money to impress Laura Howard tells bank manager Scrimshaw that ,if he advances him a thousand pounds,he will cut him in on ownership of a diamond mine he discovered in Africa. Howard uses Laura's house,claiming it as his own,to show Scrimshaw phoney diamonds and a pretend map but they are interrupted by the window cleaners and then by Mary,who throws the map on the fire and causes the 'diamonds' to melt into nothing.
—don @ minifie-1