What is the inscription on the stone of Excalibur?

On the marble block, it was written:

"Whosoever pulleth out this sWord of this tone and anvil is rightwise King born of all England."

**According to TH White's The Once and Future King, on page 200, the inscription is on the sWord itself and not on the marble block or the anvil. The quote of the inscription is on page 201. There is nothing written on the stone or anvil. It's the sWord, Excalibur, that's important. And for Arthur to draw.