To submit multiple items to the World-Tree collection, please register as a guest user. The registration process only takes a minute, and it will allow you to benefit from other features of the archive, such as the ability to comment on items and exhibitions. It will also help us to stay in touch with you and let you know how your contribution is being used. Alternatively, you can send your files to us at firstname.lastname@example.org and we will add them to the database for you. This can be useful if you have multiple files that you want to send via file transfer, for example.