This verse implies that the father was frequently on the very edge of his property hoping one day his lost son would return. (everettchristiancounseling.com)
A faint breeze had sprung up; now it stirred the drapes in the open window of the guest room upstairs; through that window one could see the pool and the patio and much of the gently sloping land beyond as it led to the row of apple trees marking the distant edge of the property line. (bookbrowse.com)