I imagine English-speaking Orthodox would have been pretty rare at that time, and English prayer books even rarer. I believe the first English-language prayer-book to get any wide distribution was Hapgood's 1906 service book, which was really not targeted to the average layman. The Manual of Orthodox Prayers, published by the Sts Sergius and Alban Fellowrship in 1945, might be the first lay-oriented prayer book. Even in the Greek, Russian, etc., though, keep in mind that prayer books are relatively modern (as in the past 3 or 4 centuries) and only a certain stratum of literate laity would have used them.
