Hello All,
I'vee bought a fount of 18pt Parisian Ronde by Stephenson Blake and some of the characters baffle me.

What was the purpose of the small slash with comma and small slash with period characters? And what about /o'c? I gather these had something to do with invitations and/or calling cards (looking at the /r. and /rs. sorts), but their use eludes me.
Thank you in advance!