As I've already added an image of Hertford House to this thread... a lady called Sue Ward added these images to FB over the weekend. They are possibly the best complete images I have seen of Hertford House and certainly of its garden. Taken in the early 50's when her mum came to Coventry from Wales and lived there as it was apparently used at that time by the YWCA.
...and the garden - this is looking SE towards Queens Road on the other side of the wall at the far end. I think that property on the very left would be at the very southern end of Starley Road. On Old Maps it's listed as being known as South Gate.