1.   Wycliffe traced the route the undertaker must have taken.

2.   When he looked up, he noticed a white bird flying from one tree to another, tracing their route with them.

3.   By measuring how closely current populations are related, the authors trace the routes by which early humans migrated around the earth.

4.   The birds are ringed so their migration routes can be traced.

5.   At the same time, it is important to trace the route of infection.

6.   I recently traced the route of Zheng He, albeit by air, to Singapore from my home in Shanghai.

7.   Investigators traced his route to Karachi, Pakistan, via Istanbul, Turkey, but there the trail was lost.

8.   Instead, we traced their route in sea kayaks, crafts with roots among another set of northern mariners, the Eskimos.

9.   It started raining harder as he slowly traced her route.

10.   Postal officials said that investigators were tracing the route of the bin, which tested positive for anthrax contamination, to confirm that the letters inside had been irradiated.