Help adding a book

Hello and thanks for checking on my topic.

I'm hoping to get a bit of help regarding an old Sherlock Holmes series in Portuguese that has been passed on to me. I'm hoping to add it to my collection, but the books have almost no information about themselves. Here are some pictures of the first volume: https://imgur.com/a/Yjf7OlZ

As you can see it has the publisher (Melhoramentos) and the edition within the publisher (fourth) but no mention of the publishing year, no barcode and no ISBN as it's probably too old for it. I tried googling it but got almost no hits.

So, how would I go about adding these books correctly?

Thanks in advance for the help.

Your choices would probably be either

search by title in a Portuguese source
OR
enter as much information as you have manually

Probably this will not autocombine into the correct work, but if you know the original title, you can combine it yourself.

I have not looked at your picture, as I don't often follow links out of the site.