Final answer:
The provided texts do not mention a specific item found by a waiter on the floor after a clergyman and an old lady left the table. Instead, various remnants of a meal and general disarray are described.
Step-by-step explanation:
The text does not specify any particular item that the waiter finds on the floor specifically after clearing the table that had been occupied by the clergyman and the old lady. Instead, it provides a general description of the chaos and leftovers from a larger gathering or event.
The remnants include items like crumbs of bread, potato parings, nutshells, and bits of cake on the table, as well as coffee and ice-cream stains and spots of congealed gravy, illustrating the aftermath of a meal that was heartily enjoyed by the guests.