Old Maps of Truro

Historic Maps of Truro and the local area.

i have come across a photo of 4 lads and a gentleman at calenick bridge in a book 'industrial archaeology of cornwall' but do not know what year and unfortunately unable to produce here but if anyone know of this photo can tell me what year and by such luck know who are in the photo thank you

My family lived at Boscawen Row, 1942-1959, at No. 16.