as already noted above , the individual valuations made by the three commissioners are of little value , if at all ; because the same were irregularly prepared , not to mention the fact that the same were not subjected to the indispensable hearing requirement before the trial court wherein the commissioners could have been cross-examined on their respective reports , the bases thereof , how they reached their conclusions , and their qualifications , and related matters-vital to the credibility , or lack of it , of their valuations .