1. Probate records. The probate records for Joan Higgins should be available at the local probate court. These records will include information such as the date of death, the names of the executors of the will, and the beneficiaries of the will.
2. Online databases. There are a few online databases that contain information about wills. One such database is the National Probate Calendar, which contains records of wills from 1858 to 1996.
3. Solicitors. If Joan Higgins used a solicitor to create her will, you may be able to contact the solicitor's office to obtain a copy of the will.
4. The Land Registry. If Joan Higgins owned any property in England or Wales, you may be able to find a copy of her will in the Land Registry records.
It's important to note that if Joan Higgins died more than 100 years ago, her will may not be publicly available. In this case, you may need to contact a professional genealogist to help you find the information you need.