Phillip Lane is one of those CBD slits you walk past a hundred times before you notice the sandstone. It is a service laneway that once backed the Macquarie Street houses and still runs beside the rear wall of the Chief Secretary’s Building — the big government pile occupied from 1878. The low arch, leftover guttering and cobbles are why the Dictionary of Sydney still bothers to file it: a scrap of street fabric the tower boom somehow missed.
On the Macquarie Street side rises The Astor (the live post’s “White Astor”) — the fashionable 13-storey apartments finished in 1923, an early advertisement that Sydney’s better-off would live stacked in the city rather than only in villas. Across Phillip Street the Museum of Sydney marks the site of the first Government House. The lane is the hinge between those three stories: colonial service yard, Victorian bureaucracy, and interwar apartment living.
Humanise the live note, keep the Chief Secretary / Museum cross-links short, and don’t invent build years for every vanished neighbour lane. If you later add a photo, shoot the arch and cobbles before the glass reflections take over.