These are the grafting points of the branches of the various family groups that make up the combined tree.
The grafting point individual is in the records for both groups, e.g. Eliza Britain (reference number 51) is in the Britain group & the Gibbs group.
Gibbs Hicks
Britain
│ │
│
│ └─Richard
William Hicks (#H1) = Sarah Britain (#367) ─┤
│
│
├──────────William Gibbs (#50) = Eliza Britain (#51)────────────┘
│
│
Long Long - Williams
│
│ │
│
├─Henry Long(#164) = Mary Williams (#165)─┘
│
│
├─Edmund Gibbs (#38) = Harriet Long (#39)─┘
│
│
Martin
│
│
├─Edmund Gibbs (#31) = Charlotte A. Martin (#32)─┘
│
│
Divers Earl
│
│
│
│
└─Mary Divers (#29)
=
William H. Earl (#28)─────┤
│
│
│
Williams
Powell │
│ │
│
│
│ ├─George H. Williams (#408) = Annie Mariah Powell (#409)─┘
│
│ │
│
│ └─Gladys G.
Williams (#25) = Charles H. Earl (#24)──────────────┤
│
│
├────────Thomas V. Gibbs (#6) = Gwendoline M. Earl (#7)─────────────────┘
│
│
Boultbee
Start
│ │
│
│
├─Thomas Boultbee (#B12) = Sarah Start (#St1)─┘
│
│
│
│
Parkes
│
│ │
│
├─James Boultbee (#JIPB 7B 450) = Clara Parkes (#B3)─┘
│
│
│
│
│
│
Roome
│ │
│
│ └─Constance Boultbee (#11)
= Anthony W. Roome (#10)─┤
│
│
├────────────Melvyn T. Gibbs (#1) = Ann Roome (#2)────────────┘
│
│
Beardmore
│
│
├─David T. Gibbs (#3) = Joanne M. D. Beardmore (#Be1)─┘
│
│
Strawbridge
│
│
└─Philip G. Gibbs (#5) = Sarah Strawbridge (#S1)─┘