Or,they place long thin rolls of clay on top of each other and then make them smooth.

VOA: special.2009.09.09

After a long time, some of the rock changes to clay.

VOA: special.2009.09.14

A friend of Webster's described the meeting in these words: "Mister Clay came to Mister Webster's house and had a long talk with him about the best way to settle the difficulties growing out of slavery and the new territories.

VOA: special.2009.03.26

"He's been so dominant for so long on clay, but everyone knew that just couldn't last, " said Djokovic, who was also beaten by the Spaniard in last year's Rome final -- Nadal's last tournament win.

CNN: Djokovic dumps coach Martin ahead of Monte Carlo campaign

Federer, by contrast, has taken a long time to adapt to clay.

CNN: Profile: Roger Federer - The greatest ever

That ll go a long way toward getting Chairman William Clay Ford Jr.

FORBES: Ford's Big Buyouts