Acts and Deeds are presumed to have been done according to what is common and customary.
Arbuthnot v. Keiths
Date: 25 February 1662 Case No. No 296.
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A pursuit at a donatar's instance against a vassal for the avail of his marriage, was sustained, without necessity to prove that it was a ward-holding, which is presumed where the contrary is not proved.
Fol. Dic. v. 2. p. 162. Stair.
*** This case is No 29. p. 8528. voce Marriage, Avail of.
