Swallow coming

玄馬至 (つばめきたる, swallow coming).

Copied for practice from works of senior Tenkoku artists in Kyoiku Shuji text. Oct MMXI. In progress. 

These are all carved in reverse. So the ones on the left and middle are 至馬玄, and will read left to right 玄馬至 when impressed. The third seal on the left reads left to right, then bottom to top. The reading is as follows: first the one on the right 玄; in the second column there are two characters, but the bottom one 馬 precedes the last one 至–at the top!