Paul Ysart, with the help of William Manson and other assistants (i.e. Peter Holmes) made paperweights at their own studio, Harland Glassworks in Reiss, Scotland between the years 1970-1975. The paperweights made at Harland Glassworks destined for the United states were signed with Paul's signature "PY" cane and those that stayed are signed with an "H" cane.