Possible Clues:

• Old couple who wrote amusingly
• Windsor Davies and Donald Sinden played rival antique dealers in the sitcom Never the ____
• Mark __, pseudonym of Samuel L Clemens
• Old couple needing time on the wagon
• US storyteller Remus, perhaps, penning author’s introduction
• With 'the,' East and West, in a Kipling ballad
• With "the," East and West, in a Kipling ballad
• Creator of Sawyer and Finn
• Sawyer's chronicler
• A writer Kipling never expected to meet