An extraordinary range of material virtually filling one substantial volume, starting off with the imperforate primitives, ie the 1926 "cross dagger" types on the various different papers, superb used as well as mint. Some of the better items seen include a highly unusual pair of the #1 on piece used but rouletted, accompanied by certificate. This is certainly rare. Then follows further studies of these issues on both the laid and wove papers, again mint and used with the latter occasionally on piece, all four margined examples. This leads through to the foreign and domestic postage issues of 1930/31, again with some highly specialised material including 11 of the same mint overprinted specimen, however please note that some of these are stuck down on the page but are of excellent appearance. Then some useful commercial postal history, including for example Scott #8, #11, #15 and #16, making the correct 14 bogaches rate for registered purposes to Switzerland, originating in Hodlida Yemen through to Feurthalen via Aden on this scarce 1934 letter. More commercial postal history, represented by further registered with different combinations again to make the 14 bogaches rate, as part of the correspondence to the same addressee. Then yet further commercial covers this time single usage, as well as attractive philatelic covers with many different denominations. More interesting pages this time with stamps for example, 1 mint and 2 used examples of the handstamped in black of  ,Scott #30, ludicrously low in Scott compared to its scarcity. Then further unusual material including plate number imperforate blocks of 4 of various values of the 1939 combined flags of Saudi Arabia, Yemen and Iran definitives, as well as various different singles, again corner plate number sheet marginals imperforates, etc. These imperf issues are certainly scarce and with the plate numbers exceptionally so. Occasionally some of the later material is out of chronological order, nevertheless the same pattern of collecting the unusual continues. For example, sheet corner marginal blocks of 6 of the type A7 1940 high value definitive with different plate numbers, followed by 6 commercial usage covers of the same series including registered from Taiz, as well as other places on the Red Sea including combination defins, often sent to the USA, however the Taiz cover sent to the interesting destination of Steamer Point, Aden, etc. There are also internal usages noted, written of course in Arabic. For those that find this area challenging and recognise how scarce it is compared to its availability, then this collection is not to be missed. An excellent opportunity to buy before the market catches up, especially on the postal history.