The United States Court of Appeals for the First Circuit hears appeals from U.S. District Courts located in Massachusetts, Maine, New Hampshire, Puerto Rico and Rhode Island.
The Court Web site posts contact information, posts opinions, calendars, rules, forms, filing information, etc. Opinions are available free from Google Scholar (1920s-present).
For a practical guide to court procedures, see Federal Civil Litigation in the First Circuit, published by Massachusetts Continuing Legal Education, Inc.