Final answer:
The 1872 edition's epilogue of "Idylls of the King" was dedicated to Queen Victoria, the widow of Prince Albert.
Step-by-step explanation:
The poem "Idylls of the King" was dedicated to Prince Albert by the renowned poet Alfred Lord Tennyson. Subsequently, the 1872 edition's epilogue was dedicated to his widow, Queen Victoria, after Albert's passing. Tennyson, who was appointed Poet Laureate by Queen Victoria, was very productive in his later life, composing a variety of literary works including poems, drama, and essays. His lasting popularity and contributions have solidified his place in Victorian literature and the English literary tradition.