Robert H. Peterson Gas Logs

I was given an unused heater and some gas logs from someone who is deceased. The heater is a Timberline NVT-11173R and the gas logs are Robert H. Peterson CHN-30. A local fireplace store told me they believe the logs cannot possibly be Robert H Peterson because they are not stamped with that name. I question this because they are in a Robert H. Peterson carton. One of the logs is cracked but held together by rebar or ? Is there a safety hazard in using it? If you'd prefer to reply to me directly, remove xxxxx and replace it with my user name (ralft).
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