The term 'Nursery Rhyme Merchant' can be summarized as a Pieman, which is a six-letter job title. A Pieman is someone who sells pies, usually in a market or street stall. This type of merchant has been around since the Middle Ages and is still popular today. The pies they sell are often filled with sweet or savoury fillings, such as fruit, meat, or vegetables. They may also offer other baked goods, such as pastries, cakes, and biscuits.