Final answer:
The method of heat transfer not mentioned in the story is radiation, which involves the transfer of heat through electromagnetic waves and does not require a medium.
Step-by-step explanation:
The only method of heat transfer not mentioned in the story so far is radiation. Heat transfer can occur in three ways: conduction, convection, and radiation. While the story provides examples that suggest conduction (the hot metal handlebars) and possibly convection (the difference in temperature inside and outside the house), it does not mention radiation explicitly. Radiation refers to the transfer of heat through electromagnetic waves, which can occur through space and does not require a medium like air or water to transfer heat.