Canadian Railroads > Tracing Canadian connections

Hello,

Can anyone help with piecing together the movement of crude traffic from CN to NS. Wednesday was busy down here with 2 trains heaping with Canadian products. See...http://www.trainorders.com/discussion/read.php?2,3369954.

NS 12N-01----DPRX 256415, PROX 51165, CTRX 729967, CP 606321, CBTX 729760, TILX 255072
NS M2N-01----CP 602823, CBTX 729886, UTLX 675953, TILX 254432

The CP cars are grain (non hazardous if that helps). It would be interesting to know if CN also ran these as 2 separate trains or did the traffic just gather at Chicago. Unless one is mostly CN and the other mostly CP traffic?

Any help appreciated!