Penley began his stage career in 1871 in farce and was soon performing in musical theatre. From 1875, he appeared in several runs of Trial by Jury, making an impression when he became a replacement in the role of the Foreman of the Jury.
Penley started his theatrical career in 1871 in comedy and was soon performing on stage in musical productions. From 1875, he appeared in multiple performances of Trial by Jury, making a notable impression when he took over the role of the Foreman of the Jury.