I am a descendant of Edgar Side the full brother of the Robert Side who married Ellen Ling. I know of other descendants of Robert and Ellen through Christopher Robert Side b. 1884 living in Essex (as of 2006).
I also know of other descendants of the father of both Robert and Edgar. His name was Robert Henry Side and appears to have been born in Micham, Surrey in 1800.
Edgar emigrated to the US in 1870. In 1876 his sisters Harriet and Flora followed.
I am myself waiting on the following book, but you might want also to consult it.
Searching for William Harold Seide, by John Henry William Seide, privately printed. It was written by a descendant of Harriet Side and is available through the Family History Library System.
I am trying to piece together (at minimal expense) at least a descendancy table for Edgar's and Robert's father. This is a rather large task as he had at least 17 children.
I (and others) are particularly mystified about the history of the youngest of these Julius Side born 1866. He emigrated to the US in 1876 with Harriet and Flora but much of his life in the US seems to be unknown. I know that it is improbable that you would have information about him but I should ask.