I think the most successful artists that work with sculpture and installation are those that address and involve their work in a highly considered conversation with space. In my opinion, there are few others who do this as well as Fred Sandback (1943-2003), an American artist who was renown for his strictly geometrical yarn sculptures, prints and drawings.

Writing about his first experiences using yarn, Sandback says:

The first sculpture I made with a piece of string and a little wire, was the outline of a rectangular solid—a 2 x 4 inch—lying on the floor. It was a casual act, but it seemed to open up a lot of possibilities for me. I could assert a certain place or volume in its full materiality without occupying and obscuring it.

And on the use of straight lines:

The line is a means to mediate the quality or timbre of a situation, and has a structure which is quick and abstract and more or less thinkable, but it’s the tonality or, if you want, wholeness of a situation that is what I’m trying to get at.

Much like the work of Margaret Roberts, Sandback's work proves how drastic an intervention of something as subtle as string can have on the perception of space.