An old street can hold traces of many periods, even when its buildings appear similar at first glance. A careful walk begins with visible details rather than a confident story about their age or origin.
Look at entrances, rooflines, paving and the junctions between neighbouring structures. Changes in material may suggest an alteration, but they do not establish when or why it happened. Photograph details from public areas without obstructing residents.
Compare your observations with available maps, archive photographs or reliable local records. Record the date and source of each item. A map can show an earlier arrangement while still omitting features that mattered to people using the street.
End with a small set of questions to investigate. Who used the space, which routes changed and what has survived? Treat the walk as the start of research. Curiosity becomes more useful when it leaves room for evidence to correct the first impression.