Complex sentence: During the economic recovery in 1838/39, outstanding notes were gradually retired but as the recovery failed to take hold and the panic turned into a depression which lasted through the early 1840s several acts from 1838 to 1843 authorized further issues of Treasury Notes.
Split into simpler sentences: During the economic recovery in 1838/39, outstanding notes were gradually retired but as the recovery failed to take hold and the panic turned into a depression which lasted through the early 1840s. Several acts from 1838 to 1843 authorized further issues of Treasury Notes.