This letter requests information about a certain city, county or state.
1234, Main Street
Boston, MA 02123
05 April, 2005
<Recipient Address Goes Here>
<reason>, and I am writing to you to request copies of any information you may have about <area> and its history.
Please send me any information you may have available, including magazine and newspaper articles, maps, land deeds, and <other materials>.
You may send the information to <address>. If you have questions, please call me at <phone number>. Thank you very much for your time and assistance.
encl: <List of enclosed items goes here>