A man is said to be seised in his demesne as of fee of a corporeal inheritance , because he has a property,dominicum or demesne, in the thing itself. But when he has no dominion in the thingitself, as in the case of an incorporeal hereditament, he is said to be seised as of fee,and not in his demesne as of fee. 2 Bl. Comm. 10G; Littleton,
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