Approach the construction of your cover letter in a scholarly, sensible fashion, even if your grant appeal seeks expenses for research into the arts. Call the grantor. Ask if the letter is to be addressed to a specific person or folks on the committee. Check to be certain names are correctly spelled and titles are properly worded.
Always assume that your cover letter can become separated from the proposal itself, so make sure it can stand alone and identify you as the writer. Include your name, address, e-mail and phone numbers in the upper left quadrant of the letter and the full address of the granting agency below it. Match the cover letter's date to the date on the grant application to be consistent.
Write the first draft of your research grant cover letter without regard for length. Don't get caught up in the editing process; just get your appeal down on paper. Write long, explaining the purpose of your letter---granting agencies are often involved with multiple funding projects at the same time and it helps to be reminded of the funds you're seeking.
Introduce yourself, summarize your research project, refer to the outcomes you anticipate as a result of having your work underwritten by the grantor by invoking the three Ps: people, places and problems. Tell the reader up front how much money you want, why you want it and why you deserve the grant over other applicants.
Show the granting agency how your research project aligns with its mission statement. Fill your cover letter with descriptive, engaging words that put a face on your research project. Mention research-based proof of the need for your project to go forward. Create a paragraph that sums up your appeal and reminds the reader of how his generosity can underwrite change.
Start editing. Aim for no more than 250 words---fewer if possible. Rearrange and shorten sentences. Chop superfluous words, making sure your appeal stays intact. Close on a hopeful, sincere note, thanking the reader for her consideration. Keystroke your full name at the conclusion of the letter, but sign only your first name to add a personal touch.