No.

Try shifting one key left instead (to decode original intended letters):

t→s, h→g, m→l, y→x, l→k → sglxk t→s, l→k, g→f, h→g, r→q, a→z, m→l → skfgqzl l→k, a→z, y→x, t→s → kzxs l→k, l→k, a→z, n→m, d→c, r→q, w→v, y→x, d→c → kkzm cqvxc (no) Given the time, I’d guess it's "the military telegram late last night" or something similar, but not fitting neatly.

t→g, h→s, m→n, y→b, l→o → gsnbo (no)