How did william blake’s engravings, which accompanied his poems, provide what one analyst called “the missing link with commerce”?

Being both a skilled artist and poet, he used a method of engraving called "intaglio engraving" which could be mass produced so that it could be more accessible amongst the common person.

Explanation:

Blake's business work to a great extent comprised of intaglio engraving, the standard procedure of engraving in the eighteenth century in which the craftsman chiseled a picture into the copper plate with plates taking months or years to finish, however as Blake's contemporary, John Boydell, acknowledged, such etching offered a "missing link with commerce", empowering artists to interface with a mass audience and turned into an enormously essential movement before the end of the eighteenth century.

if you read the story there are characters like the neighbor, son, wife, and him himself.

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