Hi, this is the DAR volunteer trying to answer your questions. You may obtain the record copy of the pension for Ambrose Cameron from the National Archives. This would be listed under M804 of which there is over 2670 rolls. However, it is by alabetical order I believe.
I usually go to the Great Lakes Regional center in Chicago and depending on where you live there maybe one close by your resisdence.
I could not find the exact address here, but there is a Web site for the National Archives in Washington, DC. From there the information is available on how to order the copy of the pension and the cost.
If the children are mentioned obviously this would add to the documentation of this Ancestral Patriot.
If I can be of any other assistance, please let me know.
This is a free service provided by the NSDAR volunteer look up service.