Joe;
Thank you for your reply. Yes, directing the repositories to sid (Debian Unstable) is the correct thing to do. /etc/apt/sources.list is the correct filepath, however, is it not ? The packages in Debian Unstable are actually quite good, I have learned.
In the first 'Accept this solution', you indicate that I should reply 'n', but I would mention that this would install libcurlpp-dev and the package I am seeking, libcurlpp0{a}.
In the second 'Accept this solution', you indicate that I should reply 'y', but this does not indicate that any action will be taken to install libcurlpp0.
Would you mind explaining why I should reject the first solution and accept the second solution?
I want to again mention that your response to my earlier question was correct and had the effect I sought. I am very grateful to you for this and look forward to your explanation to my latest questions.