I would also just keep the timeline segments to a few words and maybe an accompanying picture but nothing intensive or complex. anything that needs to be explained should be in a paragraph.

Here you should also have links to the two subpages about Newell Long and Ralph Papakhian

The following is a sample:

Timeline Draft

Timeline story editor is under the cool timeline plugin settings. Create a new post (“story”), add a headline/text/photo if wanted + set the date + add an icon if you want.