"Archaeologist? Yeah. They're still archaeologist, even when they have whole planets to dig up instead of just a city here and there," the Doctor said as he adjusted the settings on the sonic screwdriver, his thoughts briefly straying to River. He wondered what discoveries had been in her name, and how she could possibly have become an archaeologist in the first place if she'd known him since she was young. It was one of the great mysteries of the universe.
"There," he remarked, once he had the sonic screwdriver as he liked it, his attention focused once more on the task ahead. "Let's try it, shall we?" A quick test showed that yes, indeed, the setting would allow him to etch little hatch marks on the rock face.