Arnold worked over the next few months to publicize this fact ; however , in early April , just one week after Washington congratulated Arnold on the 19 May birth of his son , Edward Shippen Arnold , Washington published a formal rebuke of Arnold 's behavior . Arnold worked over the next few months to publicize this fact ; however , in early April , just one week after Washington congratulated Arnold on the May 19 birth of his son , Edward Shippen Arnold , Washington published a formal rebuke of Arnold 's behavior .