Dear Folks:
I subscribe to and/or am a member of a number of historical and genealogical Facebook groups, message boards, and list servers. I am the administrator of several and the webmaster for various genealogical and historical websites. Over the past several decades I have seen thousands of queries posted. Below is what I have learned. Take what is useful. While the context is Caswell County, NC, I believe the applicability is universal.
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1. It would help greatly when posting a query to give as much information as possible. Just asking for help finding a relative that once lived in Caswell County is not likely to generate much interest.
(a) Give as much temporal (dates) and geographic (place) information as you can.
(b) If you know the person was once in another area (such as another state), provide that data.
(c) If the family had property in Caswell County, tell where it was.
(d) If you already have some census information or estate records, share them.
(e) If there were variations in the name (given name or surname), explain them.
(f) Let people know the sources you already have consulted so they do not waste their time trying to help you.
(g) Also, a super way to generate interest in your query is to provide something of possible value to others in your message. You are more likely to generate assistance with your plea for help if you include something of value in your message. Too many messages just say: "Help me."
(h) ALWAYS check the Caswell County Genealogy database and the Caswell County NC GenWeb website before asking for help (and state in your message that you have consulted that resource). These resources will be found at:
Caswell County Genealogy
Caswell County NC GenWeb
2. If you post a query with a document attached, you are much more likely to see positive results. If you need help, ask the site's administrator.
I recently observed a lengthy exchange of messages about a will in the possession of one of the participants. Discussion about the will went on for weeks, but no one ever thought about posting the will. That will could have been scanned and uploaded for all to see.
If you are using a genealogical software program to record your findings you can create a GEDCOM file that can be uploaded to show in detail to what your query relates. Snippets of your family tree can be converted to GEDCOM files and uploaded. Genealogy programs such as Family Tree Maker allow outline descendant and genealogy reports to be created. These then can be copied to your message. They need not be long, just enough information to help others help you.