Dear author,
I really appreciate your exhaustive responses to the reviewers’ questions and comments. I invite to you to resubmit a revised manuscript. The manuscript should incorporate all changes that you detailed in your responses. Therefore, the new manuscript will be reviewed.

Sincerely,
Andrea Butturini

Dear Authors,
After waiting in vain for a long time for the reviewer report, I have to proceed with the final decision.
I recognize that has been extremely difficult to find reviewers for this manuscript.
I read carefully your revised manuscript and responses to the reviewers. I am not an expert on cave drip water chemistry. Therefore I cannot judge the most technical aspects. However I found the text interesting and the topic extremely attractive. This topic sounds totally new to me. Results seem to me coherent and response to the reviewers is exhaustive. Additionally, the revised text strongly improved after reviewers’ suggestions and comments. Obviously some aspects are questionable and might create some debate. But nothing is perfect! ..and if some debate emerges it will be welcome! On the other hand I appreciate your effort to adopt the reviewers’ suggestions. For instance the revised text better integrate the delta18O modelling with field data.
In conclusion, I support the publication of your manuscript in the present form.

Sincerely,

Andrea Butturini