That's what we've always understood the photograph to be, the official Christening of Gt Uncle Frank
My grandfather is the young lad bottom right. His brother went into publishing, and granddad developed a love of the Steam Train, he luckily did his dream Job that of Steam Engine driver for the GWR...
Still remember all the models, paintings, pictures he had of Steam Engines, and he lived next to the Railway line at Taunton.. Couldn't be far away from his trains