I noticed one line in the Diary of William Henry Winter WWI 1915 that manages to convey a lot without directly giving any information about his opinions or relationship with this person:
'Major Saunders is supposed to be on his way back here as well but I don't know as he is coming back to our Coy, I hope not any way. We have got a good man now.'There's nothing in the rest of the entries online that provides any further background. It may be that sections of this correspondence either didn't survive, weren't held by the same person, or perhaps were edited before deposit with the library or during transcription (it's particularly hard to judge as the site doesn't have images of the original document), so this particular silence may not have been intentional.
Whatever the case, it's a good reminder that there are silences behind every piece of content. While it's an amazing time to research the lives of those caught up in WWI as more and more private and public material is digitised and shared, silences can be created in many ways - official archives privilege some voices over others, personal collections can be censored or remain tucked away in a shoebox, and large parts of people's experiences simply went unrecorded. Content hidden behind paywalls or inaccessible to search engines (whether inadvertently hidden behind a search box or through lack of text transcription or description) is effectively hushed, if not exactly silenced. Sources and information about WWI collected via community groups on Facebook may be lost the next time they change their terms and conditions, or only partially shared. Our challenge is to make the gaps and questions about what was collected visible (audible?) while also being careful not to render the undigitised or unsearchable invisible in our rush to privilege the easily-accessible.
[Update: I've just realised that Winter might not have needed to provider further context as it seems many men in his unit were from the same region as him, and therefore his relationship with the Major may have pre-dated the war. Tacit knowledge is of course another example of the unrecorded, and one perhaps more familiar to us now than the unsayable.]