Summary

Peter Vivian Daniel Baltimore and Susquehanna Railroad Company v…

Now it must be apparent that the act of the Maryland legislature of December, 1841, simply ordering a new trial of the inquisition, does not fall within any definition given of an ex post facto law, and is not therefore assailable on that account. We have already shown that this law impaired the obligation of no contract, because at the time of its passage, and in virtue of any proceeding had under the charter of the company, no contract between the company on the one hand, and the state or the proprietors of the land on the other, in reality existed.
Source: Wikisource

Peter Vivian Daniel Baltimore and Susquehanna Railroad Company v…

That there exists a general power in the state governments to enact retrospective or retroactive laws, is a point too well settled to admit of question at this day. The only limit upon this power in the states by the Federal Constitution, and therefore the only source of cognizance or control with respect to that power existing in this court, is the provision that these retrospective laws shall not be such as are technically ex post facto, or such as impair the obligation of contracts.
Source: Wikisource

Peter Vivian Daniel Baltimore and Susquehanna Railroad Company v…

This will be indispensable in order to ascertain whether any variation of these conditions, amounting to an infraction of the contract, has been made by the Maryland legislature. After declaring that the inquisition, when returned, if no objection be made, shall be recorded, the fifteenth section provides that the payment or tender of the valuation to the owner of the land, &c., shall entitle the company to the estate and interest in the same as fully as if it had been conveyed by the owner or owners thereof.
Source: Wikisource

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