Congratulations to WSJ Magazine’s fashion, news and features director Elisa Lipsky-Karasz and Page Six’s own deputy editor Ian Mohr on the arrival of their son, Arthur Edward de Pallières Mohr. Arthur was born at Mount Sinai Hospital on the Upper East Side on Friday at noon, weighing in at a bouncing 9 pounds, 8 ounces. We’re told mother and baby are doing very well, and adorable Arthur — who arrived a day after his parents’ fourth wedding anniversary — is growing bigger and more vocal by the moment.