It was speculated in one of the earlier threads that the box on the windowsill was washing powder, meaning that they were sitting in front of the laundry. This is a long shot, and I must admit thatI am over analysing like crazy waiting for more news, but could they have been sitting in front of the laundry, waiting for Spedding to show up? It's perfectly normal that they would be sitting on the porch anyway, but I wonder if there were other outdoor areas they could have chosen to sit. I remember the porch was quite small from diagrams and there was a big balcony.
Judging from the diagram on this page:
http://m.dailytelegraph.com.au/news...ing-from-kendall/story-fnpn118l-1227173646506 the porch is right near the driveway where they would hear the van pull up.
William didn't run towards the driveway, though. He ran in the opposite direction. I wonder if Spedding or an associate pulled up near the house to check the street numbers or to check paperwork before reaching the driveway, then saw little William by himself out in the shrubs?