21. The remains of walls up to 12 metres are visible today and stretch over the horizon. 22. This means that tubes are often made from nickel-based materials with walls up to 200mm thick. 23. When I rebuilt the place, I put the wall up here and thought I was home free, 24. The remains consisted of sections of a wall up to four courses high and laid on bedrock. 25. There are of rock walls up to tall in the nearby valley, giving the appearance of altars. 26. Mr . Jado-again-access wall up the field. 27. Behind the smelter and the engine sites is a stone retaining wall up to 1.8 metres high. 28. "They've got a good wall up , " he said, " and it is a little unsettling ." 29. Jen is concerned that Nick still seems to have some walls up , but she loves him anyway. 30. Wall up : After Sunday's game, the Angels activated right-handed reliever Donne Wall from the disabled list.