I think I have found the issue of the Great War in the photograph. I tried enhancing the image in post 69 and show it below compared to the the cover. It is issue no 54 dated 28th aug 1915, and the photo is General sir Archibald Hunter, Commander of then third army.
View attachment 156007
Brilliant work there
@mikejee - many thanks for taking time on that.
28th August 1915, the date on the magazine, was also David Trevor's 87th birthday, so it's quite possible that the photo session was a celebratory occasion, hence the three generations picture taken at the same time (ie "C'mon Sid, let's get one with your old Grandad while he's still with us"). He made it to 88, then passed away at the end of 1916.
From the same family history web site, here is a photo of David's eldest surviving child, Phoebe Ellen Trevor via his first wife Jane Holtom (assuming the attribution is correct. She resembles David to my mind). Born 1853 reg. Evesham - died 1921 Birmingham. She married and had six children.
Considering David was a photographer and so was his son, it seems a shame that the only photographs of him seem to have been taken later on in his life. I don't know when he first added photography to his extensive CV.
It would be nice if the photo was correctly attributed, but I believe that's the family tree where David is wrongly identified as Phoebe's husband Samuel Oakes, so caution is needed there. Phoebe used her second name Ellen some of the time and one of her sons was christened Harry David, the same as her step brother. I think there was a good family bond between Phoebe and younger step brother Harry - both had lost their mothers in childbirth when they were young children. What I'm not so sure about was their bond with David's third wife Mary Jane, who was only five years older than Phoebe, and whom David married less than a year after Harry's mother Elizabeth's death.
As for photos - we have a few of Harry's, mainly postcards, and there are CdV and Cabinet type photos out there with David Trevor branding on them, but sadly nothing family-related. Having happily bought up random collections of old photos in the past and studied them for clues as to why and where they were taken, I'd give anything to stumble across an old pile of my great great grandad's glass plates, but I think the likelihood is slim. As eldest member of the current generation I've inherited the family 'archive' such as it is, but there aren't that many photos. At some point it might be worth trying to trace any surviving descendents of the four daughters from David's third marriage. I'm currently using this family line based approach to locate some missing photos in a different local history context, and contact has been made.
One possibility might be the museum at Ashby de la Zouche, when more normal circumstances resume.