Old Shanghai Settlement Boundary Stone Uncovered (Partially)

My thanks to James Bollen for this picture of a recently uncovered old boundary stone that marked the northern edges of the International Settlement. James spotted it up on  Qufu Road/Tibet North Road (formerly Alabaster Road and Thibet Road North) where some longtangs are currently being demolished (ho hum!).Afraid I don’t know much about boundary stones so any info or guidance much appreciated – I think the Chinese character is sui, meaning to satisfy or fulfil, and by extension fulfilment. However, it appears there is another character underneath buried by the rubbish?

Any help much appreciated

No idea what will happen to the stone – a bit heavy and fixed to “liberate” so will probably get smashed soon…