Mackintosh popularised Darby more than any other Brethren author.

Entity and relation annotations:
id: 0
type: entity
value: text: Mackintosh
labels: <Person>
id: 1
type: entity
value: text: Darby
labels: <Person>
id: 2
type: entity
value: text: Brethren author
labels: <Title>
type: relation
to_id: 2
labels: Person:holds_title:Title
from_id: 0