| George Rae | | | 1867(?) | | Attribution uncertain - unclear whether early refs in Gillespie & Scott list are to Rae or to Hugh Birrell (it is not yet known whether George Smith Birrell, whose practice was taken over by Gillespie, took over his father's practice or that of Rae) |
| Hugh Birrell | | | 1867(?) | | Attribution uncertain - unclear whether early refs in Gillespie & Scott list are to Birrell or George Rae (it is not yet known whether George Smith Birrell, whose practice was taken over by Gillespie, took over his father's practice or that of Rae) |