Related Clues:

• Emulates a cartographer
• Periodic table entry
• Feature
• Krypton, for one
• You might sleep on it
• Mercury, for one
• Fire or water, e.g.
• It's found in a table
• Mariners' needs
• Essential part
• Piece of music
• They have scales and keys
• Piece of paper
• James ___, who wrote 'The Thin Red Line'
• Mercury, but not Mars