Others, with their hulls quite hidden from sight, appeared like immense floating hay-stacks moving mysteriously to their destination with horse-fodder for the city stables.
"Due North or Glimpses of Scandinavia and Russia"
Maturin M. Ballou
They formed mysteriously and moved ahead as if pushed by the light breeze.
"In Desert and Wilderness"
Henryk Sienkiewicz
The sweet summer afterglow which immediately follows the going down of the sun was spread mysteriously over all the landscape as John got in his buggy and began his return trip.
"The Man from Jericho"
Edwin Carlile Litsey