Robertson contributed to the writing for the band from their first album. Much of his contribution initially came in the way of co-writing with Page. As the years have passed, Robertson has written an increased amount on his own. He credits Jason Plumb in part for changing his perspective on songwriting, in that instead of trying to write one great song, he would commit to writing a certain number of ideas and they might not all be great, but parts of the songs would sometimes fit together into great songs. As well, Plumb encouraged Robertson to simply come up with an idea that fascinates him, and then to analyse it. The first song he wrote with this method was "When I Fall", based on the concept of "a window washer who's afraid of heights".