Letterhead. John Kenny & Sons, Builders/ Machine Joinery Works and/ Offices/ Cecil Street/ Limerick. MLetterhead. John Kenny & Sons, Builders/ machine Joinery Works and/ Offices/ Cecil Street/ Limerick.Typed letter 11-11-10 to J. Comerton, Principal, Technical Institute, re one person not yet enrolled.. Single sheet, with head printed in black ; with notes of types of services to either side of address. Watermark John McDonnell & Co. Ltd/ Swift Brook.