[PeaRidge]

The Boston Evening Transcript was a daily afternoon newspaper in Boston, Massachusetts, published from July 24, 1830, to April 30, 1941.[2]

Look it up.

[BroJoeK]

PeaRidge: "The Boston Evening Transcript was a daily afternoon newspaper in Boston, Massachusetts, published from July 24, 1830, to April 30, 1941.[2]"

Found it, but nothing confirming your alleged quote.

"... the mask [of protecting slavery] has been thrown off and it is apparent that the people of the principal seceding states are now for commercial independence.
They dream that the centres of traffic can be changed from Northern to Southern ports.
The merchants of New Orleans, Charleston, and Savannah are possesed of the idea that New York, Boston, and Philadelphia may be shorn, in the future, of their mercantile greatness, by a revenue system verging on free trade....
The government would be false if this state of things were not provided against."
~Boston Transcript, March 18, 1861

Suppose, for sake of discussion we assume it a valid quote:

Here we see the reverse of your previous quote.
In your previous quote we saw New Orleans speculating on Northern motives, and here we see Boston speculating on Southern motives.
Both are likely exaggerated, but regardless, in neither case does the editorial opinion call for war against the other.
This editorial merely asks for government "provisions against".
Note the date is March 18, 1861 -- newly inaugurated President Lincoln has called for peace but promised to maintain minimum Federal duties.
Word is spreading that Lincoln intends to surrender Fort Sumter, the threat of war has seemed to recede.

So, the suggestion that a Boston editorial recognizes potential economic problems does not change the fact that Jefferson Davis ordered war to begin at Fort Sumter on April 12, 1861.