The first named crew is on the Surrey Station
148) Twickenham───────┐ Twickenham
├──────────────────────┐
149) Marlow RC────────┘ easily │ Thames
├──────────────────────
150) Poplar Blackwall─┐ Thames │ 2 lengths
├──────────────────────┘
151) Thames───────────┘ 5 lengths