[1] [CITE@en[Time Ball—Fort Canning, Singapore - Time Signals on Waymarking.com]]
([TIME[2017-12-02 18:28:55 +09:00]])
<http://www.waymarking.com/waymarks/WMFQ93_Time_BallFort_Canning_Singapore>

[2] [CITE@en[Fort Canning Lighthouse - Wikipedia]]
([TIME[2017-11-18 18:29:08 +09:00]])
<https://en.wikipedia.org/wiki/Fort_Canning_Lighthouse>