When bonds are issued for a debt which, when added to the pre-existing valid debts, exceeds the limit, some authorities hold that the bonds are invalid in toto,1 while others hold that they are good for such amount as added to pre-existing debts equals the legal limit of indebtedness,2 and if the bonds are issued simultaneously the deficiency is to be pro rated among the bonds,3 while if issued in different series at different times those first issued are good up to the legal limit.4 Other debts which cause the limit to be exceeded are valid up to the limit.5 So a contract for the erection of a schoolhouse, which incurs the debt which exceeds the statutory limit, can be enforced up to the limit.6