IT is a tale of love and lovers that they tell in the low-lit Causeway that slinks from West India Dock Road to the dark waste of waters beyond. In Pennyfields, too, you may hear it; and I do not doubt that it is told in far-away Tai-Ping, in Singapore, in Tokio, in Shanghai, and those other gay-lamped haunts of wonder whither the wandering people of Limehouse go and whence they return so casually.