For which two reasons did Lowe favor "captive" balloons

Thaddeus Lowe's operations in his ground service's first months indicate considerable improvement in developing and understanding the observation balloon a significant and useful complement to the army service. He favored the captive balloons because:

He showed that a captive balloon could be efficiently and safely propelled to and from different locations, and that the senior officers could take measurements from virtually any appropriate point chosen.The civil war time duration 1861 to 1863, encouraged him to experiment and make success of captive balloons, here his motivation raised as he was self made scientist and aeronaut.He was attempting to study medicine to satisfy the wishes of his grandmother, but the boredom diverted him to his first passion, aviation using lighter-than-air gases.