River access and the suggested supply route for Rosas's opponents

The later follow-up returns to river navigation as part of British informal influence. These rivers can carry oceangoing warships, so opening them also makes it easier to move supplies inland. That access is suggested as an advantage for the army preparing to rebel against Rosas. The suggestion that Britain knowingly allowed such supplies through remains speculative, and the absence of proof is repeated. A logistical possibility and an allegation of official complicity therefore carry different levels of certainty.