Possible Clues:

• Bog plant captivated artist in fen
• Swampy, low-lying land
• The more fool the one that gets stuck in it
• Army captures gold bog
• Artist breaks up plant in swamp
• Swamp or bog
• Soft, wet tract
• Disorderly situation involving other ranks in service
• Does the doctor get stuck in it? More fool he, by the sound of it
• By the sound of it, the more fool he to get stuck in this