<span>The comma indicates a pause between parts of a
sentence. It is also used to separate items in a list and to mark the
place of thousands in a large numeral.
The correct answer is : We had passed through long walls of piled skeletons, with casks and puncheons intermingling, into the inmost recesses of the catacombs. & The drops of moisture trickle among the bones. Come, we will go back ere it is too late. Your cough—".
