Actually, there is no need for a full stop, since your caption is an incomplete sentence, lacking a main clause containing an independent subject and verb and expressing a complete thought.
"Ha ha, right you are, Mr. Dome. I shall get right on that as soon as I have refilled my pen. Alas, it is running low on poison, and I must go in search of arsenic after I am finished lounging about on this most uncomfortable bench."
Actually, there is no need for a full stop, since your caption is an incomplete sentence, lacking a main clause containing an independent subject and verb and expressing a complete thought.
10:51pm
Your sentence construction needs some work Anon.
11:44pm
"Ha ha, right you are, Mr. Dome. I shall get right on that as soon as I have refilled my pen. Alas, it is running low on poison, and I must go in search of arsenic after I am finished lounging about on this most uncomfortable bench."
8:52pm