1.   He was down on the shore, a shadow edged with silver light, combing the tide line.

2.   A jagged hunk of glass at the tide line finally turned me away.

3.   He has moved his house back from the tide line twice and felt secure that a shell-topped road stood between him and the water.

4.   I am trying to find a space above the tide line where I can create a reservoir of my own for work.