3. There is, however, one kind of bias which the courts suffer to influence them in their judgments it is a bias favorable to a class of cases, or persons, as distinguished from an individual case or person. A few examples will explain this. A bias is felt on account of convenience. 1 Ves. sen. 13, 14; 3 Atk. 524. It is also felt in favor of the heir at law, as when there is an heir on one side and a mere volunteer on the other. Willes, R. 570 1 W. Bl. 256; Amb. R. 645; 1 Ball & B. 309 1 Wils. R. 310 3 Atk. 747 Id. 222. On the other hand, the court leans against double portions for children; M'Clell. R. 356; 13 Price, R. 599 against double provisions, and double satisfactions; 3 Atk. R. 421 and against forfeitures. 3 T. R. 172. Vide, generally, 1 Burr. 419 1 Bos. & Pull. 614; 3 Bos. & Pull. 456 Ves. jr. 648 Jacob, Rep. 115; 1 Turn. & R. 350.