Rock Lane is a very old and early street in Wan Chai. It was opened in 1889 and closed in 1992, when Heng Shan Centre took its place. Just like many old streets in Wan Chai, it is named after the hill features, I guess the rock there is so unforgettable such it is named after that.
The government gazette showing the street: https://sunzi.lib.hku.hk/hkgro/view/g1889/657934.pdf
Name of Street—Victoria
The Lane which runs Southward between Nos. 139 and 141. Queen’s Road East shall in future be known as Rock Lane, and the Tenements abutting on the same have been re-numbered by the Assessor accordingly.
E. Bowdler, for Surveyor General.
Public Works Department, Hong Kong, 11th March, 1889.
Source for the closing year: https://oir.centanet.com/en/all/office/hk-island-wan-chai-heng-shan-cen…