Encyclopedia of Dreams
by Michael and Elizabeth Thiessen
A dream of saltpeter will bring with it an inconsolable grief over which you will have a hard time recovering as it may include the loss of a life.
To use saltpeter in making pickles in your dream shows a big change in your life.
Ten Thousand Dream Interpretation
by Gustavus Hindman Miller
To dream of saltpeter, denotes change in your living will add loss to some unconquerable grief.
New American Dream Dictionary
by Joan Seaman - Tom Philbin
One feels very guilty over the inability to perform sexually.