follow up
verb- To take further actions remaining after an event; to continue, revisit, or persist; especially, to maintain communication or verify. · Send a letter, then follow up promptly with a telephone call.
From the library
Then, should anything appear to merit a more minute examination, Albert de Morcerf could follow up his researches by means of a small gate, similar to that close to the concierge’s door, and which merits a particular description.
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