The first named crew is on the Bucks Station
258) Maidenhead (=G)─────────┐
│ Guildford (=I)
262) Upper Thames (=G)───────┼─────────────────────────────┐
│ 4:07 2 lengths │
260) Guildford (=I)──────────┘ │ Guildford (=I)
├─────────────────────────────
261) Thames Tradesmens' (=G)─┐ Henley (=G) │ 4:22 4 1/2 lengths
├─────────────────────────────┘
259) Henley (=G)─────────────┘ 3:59 1 3/4 lengths