Enquire within upon everything by Robert Kemp Philp

This class of riddle is of recent introduction. The Arithmorem is made by substituting figures in a part of the word indicated, for Roman numerals. The nature of the riddle--from the Greek _arithmos_, number, and the Latin _remanere_, back again--will be easily seen from the following example, which is a double Arithmorem: H 51 and _a tub_--a fine large fish. A 100 and _gore_--a sprightly movement in music. R 5 and _be_--a part of speech. U 551 and _as and_--a Spanish province. To 201 and _ran_--a stupefying drug. R 102 and _nt_--an acid. OU 250 and _pap_--a Mexican town. The answer is Havanna--Tobacco. _H_alibu_t_, _A_llegr_o_, _V_er_b_, _A_ndalusi_a_, _N_arcoti_c_, _N_itri_c_, _A_capulc_o_.