As the value of most things is variable, according to circumstances, the law in many cases determines the time at which the value of a thing should be taken; thus, the value of an advancement, is to be taken at the time of the gift. Of a gift in frank-marriage, at the time of partition between the parceners, and the bringing of the gift in frank-marriage into hotchpot. But this is a case sui generis. Of the yearly value of properties; at the time of partition. Of a bequest of so pieces of coin; at the time of the will made. Of assets to make lineal warranty a bar; at the time of the descent. Of lands warranted; at the time of the warranty