How else can you explain his presence in the Temple?
I think he was asking his way.

That's why I want to make some enquiries in this block." It appeared to Spargo that a considerable number of people, chiefly of the office-boy variety, were desirous of making enquiries about the dead man.

Being luncheon-hour, that bit of Middle Temple Lane where the body was found, was thick with the inquisitive and the sensation-seeker, for the news of the murder had spread, and though there was nothing to see but the bare stones on which the body had lain, there were more open mouths and staring eyes around the entry than Spargo had seen for many a day.

And the nuisance had become so great that the occupants of the adjacent chambers had sent for a policeman to move the curious away, and when Spargo and his companion presented themselves at the entry this policeman was being lectured as to his duties by a little weazen-faced gentleman, in very snuffy and old-fashioned garments, and an ancient silk hat, who was obviously greatly exercised by the unwonted commotion.
"Drive them all out into the street!" exclaimed this personage.

"Drive them all away, constable--into Fleet Street or upon the Embankment--anywhere, so long as you rid this place of them.