Long-distance trade, seals, script, weights

Detail

Oman (Magan) copper link

• Omani copper ore + Harappan copper artefacts both show nickel traces → common ore source, strong evidence of direct exchange.
• Thick black-clay-coated Harappan jar found at Omani sites — contents unknown, hypothesis: traded for copper.
• Ivory comb found at Oman site — Harappan craft export.
• Copper ingots imported to Lothal from Magan (likely Oman) [2].

Mesopotamian textual evidence

• 3rd-millennium BCE cuneiform tablets (incl. Sargon of Akkad era) record trade with Dilmun (Bahrain), Magan (Oman), Meluhha (Harappan region).
• Meluhha = Akkadian name for Indus region; goods recorded: carnelian, lapis lazuli, copper, gold, varieties of wood; haja-bird myth (identified with peacock).
• "Meluhha" glossed as "land of seafarers"; boats/ships depicted on Harappan seals support maritime trade via Persian Gulf sea route.
• Trade chronology [2]:
• Literary references to Meluhhan trade date c. 2350–1794 BCE (Akkadian, Ur III, Isin-Larsa periods); archaeological data suggest trade began c. 2600 BCE (Early Dynastic Period).
• Akkadian period: Meluhhan vessels sailed directly to Mesopotamian ports.
• Isin-Larsa period (later): Dilmun became the entrepôt/transshipment point — direct Meluhha-Mesopotamia voyages replaced by Dilmun intermediary trade.
• Dilmun cited as commercial centre in Sumerian texts from late 4th millennium BCE onward.

• Probable two-way goods: Mesopotamian bitumen (native there) traded for Harappan cotton textiles and chickens (native to Indus region, not Mesopotamia) [2].

• Persian Gulf seals carry Harappan motifs; Dilmun weights followed Harappan standard; Harappan carnelian beads found at Susa (Iran); a Mesopotamian cylinder seal with humped-bull motif attests reverse cultural contact.

Seals and sealings

• Material: steatite (soft stone, easily carved/fired hard).
• Standard format: animal motif (unicorn, bull, etc.) + short script line — likely owner's name/title; motif may have made seal legible/identifiable even to non-literate handlers.
• Functional use: sealings (impressions on clay) secured bags/goods in transit — an intact/unbroken sealing certified goods untampered + verified sender's identity, i.e., an early customs/authentication device for long-distance trade.

Script

• Sindhu lipi — undeciphered to date.
• 375–400 distinct signs → too many for alphabetic script; likely logo-syllabic.
• Direction: right-to-left (inferred from cramping of signs on left side of seals, where the engraver ran out of space).
• Longest single inscription: ~26 signs.
• Found on: seals, copper tools, jar rims, copper and terracotta tablets, jewellery, bone rods, and the monumental Dholavira signboard.

• Dholavira signboard: 10 large symbols, each sign ~37 cm high, mounted on a wooden board ~3 m long, letters in white gypsum inlay (mosaic-like) set into wood; found at the north gate of the citadel; belongs to the site's classical (Stage IV) occupation phase; hypothesised as a civic nameplate/signage at the city entrance [3].

• Perishable writing media (cloth, palm-leaf-type material) possibly used but not preserved → true extent of literacy remains unknown.

Weights

• Material: chert; shape: cubical; unmarked (no inscribed numerals).
• System: lower denominations binary (1, 2, 4, 8, 16, 32…); higher denominations decimal (160, 200, 320, 640).
• Base unit ≈ 0.856–0.8565 g; most common weight class ≈ 13.7 g (16th ratio step) [4].
• Very small weights used for high-value items (jewellery, beads); metal scale-pans also recovered, confirming actual weighing apparatus (not just standard blocks).
• Uniformity across sites (and adoption of Harappan standard by Dilmun) indicates a centrally regulated/standardised measurement system spanning the trade network, plausibly for market exchange and/or taxation [4].

Prelims Hooks

• Nickel traces link Omani copper ore to Harappan copper artefacts.
• "Meluhha" = Akkadian term for the Harappan region, meaning roughly "land of seafarers."
• Dilmun = Bahrain; Magan = Oman; Meluhha = Indus region, per Mesopotamian texts.
• Harappan carnelian beads found at Susa, Iran.
• Dilmun's weight standard matched the Harappan standard.
• Harappan seals are made of steatite and combine an animal motif with a script line.
• Indus script (Sindhu lipi) has 375–400 signs, written right to left, and remains undeciphered.
• Longest known Indus inscription is ~26 signs.
• Dholavira signboard: ~10 gypsum-inlaid symbols on a wooden board near the citadel's north gate.
• Harappan weights are cubical chert cubes, binary at lower and decimal at higher denominations, unmarked.

Mains Points

• Harappan trade network combined maritime (Gulf route to Meluhha) and overland/riverine links, evidenced jointly by archaeology (jars, ivory, nickel-traced copper) and contemporary Mesopotamian textual records — a rare case of cross-corroborated Bronze Age trade history.
• Shift from direct Meluhha–Mesopotamia voyages (Akkadian period) to Dilmun-mediated entrepôt trade (Isin-Larsa period) shows evolving, organised long-distance commercial infrastructure, not a static exchange system.
• Standardised, unmarked cubical weights + sealing practice indicate a regulated economic/administrative apparatus without needing a strong centralised political authority visible in other evidence — link to debate on nature of Harappan governance.
• Undeciphered script constrains all trade/administration inferences to material/textual-external evidence (Mesopotamian records, weights, seal distribution) rather than the Harappans' own voice — a key limitation to flag in any answer on Harappan society.