motorman-mike, I don`t know of a Charles Henry Rd by The Swan Island and i can`t remember a 173 Midland Red route from Acocks Green to the Swan, there is a Henry Rd off the Coventry Rd, on the right hand side towards Hay Mills, but its a cul-de-sac, i am sorry i can`t help, if you get any more info let me know.
A couple of films showing that Steam Lorries are not slow lumbering monsters - The Sentinel S model was capable of 60 MPH, a feat few 1930s petrol lorries could equal.
I remember seeing one, a very decrepit Sentinel, on Hagley Road when I was young - a few were returned to the road during the Suez crisis in 1957.
YouTube - Sunday Steam-up
YouTube - Sentinal Steam Lorry