A bit difficult to read, here is my attempt:
The hussar Janne Fäldtman has resided here for a long time, and during this time conducted himself faithfully and calmly, which to him by this as certificate is given.
[signed at] ??? the 13th April 1870
I think it is a certificate given to him by the garrison preacher, to show to prospective employers, and to the parish office where he will be moving in.
// Bo Johansson