These blocks were fastened to a diaphragm of wood.
One morning she was greatly distressed by finding that one of the dogs had a block fastened to her collar.
The rope was cut at the top, within reach of where it was fastened.
The planks were of wood, often beech, a few inches wide, and were fastened down, end to end, on logs of wood, or " sleepers," placed crosswise at intervals of two or three feet.
Each length was thus fastened to a sleeper at one end, while at the other it was socketed into the end of its fellow.
