What happened to the cornerstone after it was thrown into the vacant lot in the legend?
According to the legend, after the chief cornerstone was thrown into a vacant lot because the builders did not know what to do with it, weeds grew up around it. People taking a shortcut through the lot would stumble over that misused stone.
Les explains that this is a legend, not scriptural, but it is apropos. The stones for the first temple were cut at the quarry, and the quarry sent in the head cornerstone too early. The builders did not know what to do with it, so they threw it into a vacant lot. Over time weeds grew up around it, and people used that vacant lot as a shortcut, stumbling over the stone. Les says this pictures how the builders misused it and has tremendous meaning.