What he has found so far has impressed many. Two burned olive pits found at the site have been tested for carbon-14 at Oxford University and were found to date from between 1050 and 970 B.C., exactly when most chronologies place David as king. Two more pits are still to be tested.

A specialist in ancient Semitic languages at Hebrew University, Haggai Misgav, says the writing, on pottery using charcoal and animal fat for ink, is in so-called proto-Canaanite script and appears to be a letter or document in Hebrew, suggesting that literacy may have been more widespread than is generally assumed. That could play a role in the larger dispute over the Bible, since if more writing turns up it suggests a means by which events could have been recorded and passed down several centuries before the Bible was likely to have been written.

Another reason this site holds such promise is that it was in use for only a short period, perhaps 20 years, and then destroyed  Mr. Garfinkel speculates in a battle with the Philistines  and abandoned for centuries, sealing the finds in Pompeii-like uniformity. Most sites are made up of layers of periods and, inevitably, there is blending, making it hard to date remains accurately.

For example, several years ago the archaeologist Eilat Mazar uncovered in East Jerusalem a major public building from around the 10th century B.C. that she attributes to David’s time and was perhaps even, she believes, his palace. While she found pottery, it was in a fill, not sealed, making it hard to know how to relate the pottery to the structure.

Still, how this new site relates to King David and the Israelites is far from clear. Mr. Garfinkel suggests that the Hebrew writing and location  a fortified settlement a two-day walk from Jerusalem  add weight to the idea that his capital was sufficiently important to require such a forward position, especially because it was between the huge Philistine city of Gath and Jerusalem.

“The fortification required 200,000 tons of stone and probably 10 years to build,” he said as he walked around the site one recent morning. “There were 500 people inside. This was the main road to Jerusalem, the key strategic site to protect the kingdom of Jerusalem. If they built a fortification here, it was a real kingdom, pointing to urban cities and a centralized authority in Judah in the 10th century B.C.”