121. Use a semicolon before certain adverbs and adverbial expressions, when they occur in the body of the sentence and are used Conjunctively; such as, accordingly, besides, hence, thus, therefore, etc.
"Practical Grammar and Composition"
Thomas Wood
The Bishop of these islands, which Conjunctively form a See, resides on the Grand Canary.
"A Narrative of the Expedition to Botany Bay"
Watkin Tench
The purser, a very agreeable and well-behaved man, gave up his office to me, but I did not rest well, in that a whirligig of jubilant mosquitoes was occupying it Conjunctively.
"Seeds of Pine"
Janey Canuck