Two empty mailing enclosures from:
Pearn, Pollinger and Higham Limited
39-40 Bedford Street, Strand
London, W.C.2
To:
Gilbert Neiman, Esq.,
913 Copper N.W.
Alburquerque
N.M. U.S.A.
Mailing label references the contents as: "Art's the Thing."
Enclosures contain a mark for passing U.S. Customs, but the date is not legible.
Similarly, the post marks are not legible.
According to a Wikipedia article about Pearn, Pollinger and Higham, accessed on 9-8-2017:
"Pearn, Pollinger [and] Higham (Ltd) was an English firm of literary agents based in London during the early twentieth century. They were agents for Graham Greene and Paul Scott, among others. The three founders, Nancy Pearn, Laurence Pollinger and David Higham, all worked at the Curtis Brown agency after the First World War. When Curtis Brown's founder Albert brought in his son to run the company, Pearn, Pollinger & Higham was created, with help from a loan from Harold Macmillan, among others.[1] The company began trading in 1935, and continued as such until 1956, when it was renamed David Higham Associates following the death of Nancy Pearn and the departure of Laurence Pollinger."
1 "History". Davidhigham.co.uk. Retrieved 2013-09-21.