how to see marker value in syslog

Hi,
I'm using on my server Debian stable with iptables. I've configure traffic control (command tc from iproute2) based on filter fw (marked packages from iptables). I have advanced router with failover and 4 network interfaces and I had to define more than one marking rule. e.g.
iptables -A PREROUTING -t mangle -i eth0 -j MARK --set-mark 10

I've defined too rule for loggin results:
iptables -t mangle -A PREROUTING -i eth0 -m limit --limit 1/s -j LOG --log-prefix "mark testMN prerouting 10 " --log-level debug --log-ip-options --log-tcp-options

and I've found in syslog

Mar 28 14:50:11 routerUbuntu kernel: mark testMN prerouting 10 IN=eth0 OUT= MAC=00:0e:0c:7f:2a:7f:00:c0:7b:a2:e7:06:08:00 SRC
=213.218.117.68 DST=217.8.184.66 LEN=60 TOS=0x10 PREC=0x00 TTL=53 ID=23913 DF PROTO=UDP SPT=14026 DPT=16384 LEN=40
Mar 28 14:50:12 routerUbuntu kernel: mark testMN prerouting 10 IN=eth0 OUT= MAC=00:0e:0c:7f:2a:7f:00:c0:7b:a2:e7:06:08:00 SRC
=213.218.117.68 DST=217.8.184.66 LEN=60 TOS=0x10 PREC=0x00 TTL=53 ID=23963 DF PROTO=UDP SPT=14026 DPT=16384 LEN=40
Mar 28 14:50:13 routerUbuntu kernel: mark testMN prerouting 10 IN=eth0 OUT= MAC=00:0e:0c:7f:2a:7f:00:c0:7b:a2:e7:06:08:00 SRC

=64.236.34.4 DST=217.8.184.84 LEN=1448 TOS=0x00 PREC=0x00 TTL=42 ID=30688 PROTO=TCP SPT=80 DPT=3714 WINDOW=4096 RES=0x00 ACK URGP=0

but I can't find iformation about my marker value 10.
Please give me a solution, how can I investigate in log files packages with their marker-value.

Regards,

Marek