4. Have we reached in the nineteenth century a sufficient power of scientific attainment to solve all the difficulties of the problem of Genesis? No, assuredly not; but one thing is certain, that all the principal errors are destroyed, and the most essential foundation laid for undeniable principles. The yet uncertain points are, properly speaking, only minute portions, which, whatever the future may bring forth, cannot impair the whole. Notwithstanding all the resources of which it has been able to avail itself, there is an important element still wanting, without which the work can never be complete.